Running Races in Colorado

Wed, Aug 5, 2026

Aug 6 - Intermediate @ Cheyenne Mountain State Park

Colorado Springs, CO

Outside1 mileMarathon10K5K

Wed, Aug 5, 2026

Eldorado Run for the Cure

Eldorado Springs, CO

Outside4.0 mi

Thu, Aug 6, 2026

Choice City Running Festival

Fort Collins, CO

Thu, Aug 6, 2026

RMRR August 5km and picnic

Centennial, CO

Fri, Aug 7, 2026

Summer Sizzler- Denver

Thornton, CO

Fri, Aug 7, 2026

HRCA Splash Mash Dash Kids Triathlon

Littleton, CO

Fri, Aug 7, 2026

Escalante Days 5K

Dolores, CO

Fri, Aug 7, 2026

All-Out Runapalooza

Arvada, CO

Fri, Aug 7, 2026

Dog Days of Summer

Longmont, CO

Outside3.5 mi1000 m

Fri, Aug 7, 2026

Eat. Run. Adopt. 10K

Berthoud, CO

Outside10K

Fri, Aug 7, 2026

Fort Collins Running Summit

Fort Collins, CO

Fri, Aug 7, 2026

5K at the Fair

Durango, CO

Fri, Aug 7, 2026

Arapahoe Warrior 5K

Centennial, CO

Fri, Aug 7, 2026

Pat's Pony Express

Woodland Park, CO

Outside16.0 mi8.0 mi

Sat, Aug 8, 2026

Summer Sizzler- Colorado Springs

Colorado Springs, CO

Sat, Aug 8, 2026

Leadville Boomdays International Pack Burro Race

Leadville, CO

Outside21.0 mi8.0 mi

Sat, Aug 8, 2026

The Bullfrog Summer Surge

Lakewood, CO

Outside5K805 m

Sat, Aug 8, 2026

The Berkeley Circuit

Denver, CO

Outside400 m1 mile

Sat, Aug 8, 2026

Pancake Stampede 5K

Littleton, CO

Mon, Aug 10, 2026

Into the Hills Eltuck 10k

Bellvue, CO

Outside10K

Wed, Aug 12, 2026

Aug 13 - Beginners / Advanced @ Palmer

Colorado Springs, CO

Wed, Aug 12, 2026

Aug 13 - Intermediate @ Red Rocks

Colorado Springs, CO

Thu, Aug 13, 2026

South Fork Pandemonium

South Fork, CO

Fri, Aug 14, 2026

ThunderRidge Grizzly 2 Mile

Highlands Ranch, CO

Outside2.0 mi1 mile

Fri, Aug 14, 2026

Sunrise Stampede

Longmont, CO

Fri, Aug 14, 2026

2026 CKF Leadville Trail 100 MTB

Leadville, CO

Outside100.0 mi

Fri, Aug 14, 2026

Miles for Migraine Colorado

Denver, CO

Outside2.0 mi5K

Fri, Aug 14, 2026

CWCS 5K Color Fun Run

Montrose, CO

Fri, Aug 14, 2026

Run for PB& J 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Outside6.0 mi12.0 mi16.0 mi

Fri, Aug 14, 2026

Farish Mt Bike Race

Woodland Park, CO

Fri, Aug 14, 2026

Bagel Run 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Fri, Aug 14, 2026

Frontier Academy Community 5K

Greeley, CO

Fri, Aug 14, 2026

Yuma Police Department Donut 5k

Yuma, CO

Fri, Aug 14, 2026

The Cheyenne Mountain Run

Colorado Springs, CO

Outside5K10K14.0 mi

Sat, Aug 15, 2026

Erie Half & 5k

Erie, CO

Sat, Aug 15, 2026

Cancer League of Colorado Race 4 Research

Denver, CO

Mon, Aug 17, 2026

Into the Hills Eltuck 5k

Bellvue, CO

Tue, Aug 18, 2026

HRCA Wildcat Circuit

Highlands Ranch, CO

Wed, Aug 19, 2026

Aug 20 - Beginners @ Pineries

Colorado Springs, CO

Wed, Aug 19, 2026

Aug 20 - Intermediate @ Stratton

Colorado Springs, CO

Wed, Aug 19, 2026

Aug 20 - Advanced @ ABOS

Colorado Springs, CO

Fri, Aug 21, 2026

Coyote Chase 5k

Louisville, CO

Fri, Aug 21, 2026

Gunnison Valley Triathlon

Gunnison, CO

Fri, Aug 21, 2026

Warrior Waterfront 5K

Grand Junction, CO

Fri, Aug 21, 2026

Ram Run

Denver, CO

Fri, Aug 21, 2026

Staunton Rocks! Marathon and Half Marathon

Pine, CO

Fri, Aug 21, 2026

Bark n' Bolt 1K with the Pints and Pups Dog Expo

Arvada, CO

Outside1000 m

Fri, Aug 21, 2026

CEROX IRON + IRON X

Frederick, CO

Fri, Aug 21, 2026

Jog in the Bog 5k

Westminster, CO

Fri, Aug 21, 2026

Byers Peak Stampede Half Marathon & 5K Run

Fraser, CO

OutsideMarathon3.0 mi

Fri, Aug 21, 2026

2026 True Impact Ministries 5K/10K

Centennial, CO

Sat, Aug 22, 2026

2026 PH in the Park

Denver, CO

Sat, Aug 22, 2026

Rumble at the Ranch - 6 Hour MTB Relay

Highlands Ranch, CO

Sat, Aug 22, 2026

Rebel Run 5k

Denver, CO

Outside5K2.0 mi

Sat, Aug 22, 2026

Pioneer Prairie Dog Half, 10k & 5k

Westminster, CO

Sat, Aug 22, 2026

11th Annual Log Hill Hustle

Ridgway, CO

Mon, Aug 24, 2026

Eltuck Valley 12K - Lory Summer Trail Series

Bellvue, CO

Outside7.5 mi

Wed, Aug 26, 2026

Aug 27 - All groups @ Red Rocks - 5:30 pm start!

Colorado Springs, CO

Wed, Aug 26, 2026

Unbridled Golf Classic

Castle Rock, CO

Fri, Aug 28, 2026

RexRun For PAWSitivity 2026 Trail Run/Walk

Aurora, CO

Outside5.0 mi16.0 mi31.1 mi

Fri, Aug 28, 2026

Continental Divide Trail Run

Steamboat Springs, CO

Fri, Aug 28, 2026

Rocky Mountain 5K presented by School District 11

Colorado Springs, CO

Fri, Aug 28, 2026

Historic Elizabeth Main Street 5K & Family Color Run

Elizabeth, CO

Fri, Aug 28, 2026

TBK Bank Thirsty 13 Half Marathon

Durango, CO

Fri, Aug 28, 2026

Sloth Run 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Fri, Aug 28, 2026

Run for Hope - Colorado Springs

Colorado Springs, CO

Fri, Aug 28, 2026

Run for Breast Cancer 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Fri, Aug 28, 2026

Run Like the Wind 5k / 2k / Dog Jog

Allenspark, CO

Outside5K1.2 mi

Fri, Aug 28, 2026

Glow & Roll: Illuminate What's Possible

Littleton, CO

Outside5K1.6 mi

Fri, Aug 28, 2026

YMCA of Pueblo Indoor Triathlon

Pueblo, CO

Fri, Aug 28, 2026

Waneka Classic 5K

Lafayette, CO

Sat, Aug 29, 2026

RMRR Fall Marathon Training Series

Thornton, CO

Outside10.0 mi20.0 mi

Sat, Aug 29, 2026

Wine Run 5k at The Winery at Holy Cross Abbey

Canon City, CO

Sat, Aug 29, 2026

James Test Site

Lyons, CO

Sat, Aug 29, 2026

Louisville Fall Splash & Dash

Louisville, CO

Sat, Aug 29, 2026

Bluffs Run 8K

Lone Tree, CO

Outside5.0 mi

Mon, Aug 31, 2026

RiseUP Elevation Challenge

Colorado Springs, CO

Outside26.0 mi

Tue, Sep 1, 2026

4th Annual Roost Rebellion Relays

Denver, CO

Outside3.2 mi

Wed, Sep 2, 2026

Sept 3 - Social Ride Blodgett 5:30 pm

Colorado Springs, CO

Fri, Sep 4, 2026

South Fork Alder Ass Race

South Fork, CO

Outside11.0 mi3.0 mi

Fri, Sep 4, 2026

Break Your Neck: Walk, Run, or Roll

Pueblo, CO

Fri, Sep 4, 2026

Demon Dash

Arvada, CO

Fri, Sep 4, 2026

Golden Harvest Half Marathon & 5k/10k - Denver

Westminster, CO

Fri, Sep 4, 2026

Raising the Barr

Brighton, CO

Fri, Sep 4, 2026

The Beaver Run

Breckenridge, CO

Outside5K10K9.3 mi161 m

Fri, Sep 4, 2026

Recovery Run of the Rockies 5K

Fort Collins, CO

Fri, Sep 4, 2026

Cirque Series - Arapahoe Basin, CO

Keystone, CO

Outside9.4 mi

Fri, Sep 4, 2026

Nielson Challenge

Colorado Springs, CO

Sat, Sep 5, 2026

Golden Harvest Half Marathon & 5k/10k - Colorado Springs

Colorado Springs, CO

Sat, Sep 5, 2026

10k at 10,000 Feet

Steamboat Springs, CO

Outside8.0 mi4.0 mi

Sun, Sep 6, 2026

Oak Creek No Fun Run

Oak Creek, CO

Sun, Sep 6, 2026

FCA All-Abilities Labor Day 5K

Loveland, CO

Sun, Sep 6, 2026

Labor Day Half Marathon

Parker, CO

Wed, Sep 9, 2026

Sept 10 - Social NIGHT Ride @ Stratton 6:30 pm *Lights Required!!

Colorado Springs, CO

Wed, Sep 9, 2026

14th Annual Superhero Event

Greeley, CO

Outside10K5K1 mile

Thu, Sep 10, 2026

Flaming Foliage Relay - Idaho Springs to Buena Vista

Idaho Springs, CO

Outside165.0 mi

Thu, Sep 10, 2026

Res Hill Ruck

Pagosa Springs, CO

Outside3.2 mi

Fri, Sep 11, 2026

Trail Sisters Women's Half Marathon & 10k

Buena Vista, CO

OutsideMarathon10K

Fri, Sep 11, 2026

Spirit of the Valley 5k

Grand Junction, CO

Fri, Sep 11, 2026

Tater Trot 5K

Monte Vista, CO

Fri, Sep 11, 2026

Black Squirrel Half Marathon

Bellvue, CO

Fri, Sep 11, 2026

2026 Lake Nighthorse Triathlon - Sprint and Olympic

Durango, CO

Outside16.0 mi32.0 mi

Fri, Sep 11, 2026

Jungle Dash

Loveland, CO

Fri, Sep 11, 2026

National Chocolate Day: Run for Chocolates 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Fri, Sep 11, 2026

For The City Network 5K

Greeley, CO

Fri, Sep 11, 2026

Run for Mental Health 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Fri, Sep 11, 2026

Steele Trap Trail Run

Loma, CO

Outside32.0 mi44.0 mi62.0 mi

Fri, Sep 11, 2026

Rampart Rager Gravel

Colorado Springs, CO

Fri, Sep 11, 2026

The 10th Annual Run4Hope 5K for Schools

Monument, CO

Outside5K2.0 mi

Fri, Sep 11, 2026

The Denver 5k

Denver, CO

Fri, Sep 11, 2026

53rd Annual Imogene Pass Run

Telluride, CO

Outside17.1 mi

Fri, Sep 11, 2026

6 Dot Dash

Littleton, CO

Outside120.0 mi60.0 mi30.0 mi

Fri, Sep 11, 2026

The Gunni Grinder

Gunnison, CO

Sat, Sep 12, 2026

Tiger Prowl 5K

Denver, CO

Outside4.0 mi2.0 mi1 mile

Sat, Sep 12, 2026

Healthy Kids Running Series Fall 2026 - Fort Collins, CO

Fort Collins, CO

Sat, Sep 12, 2026

Healthy Kids Running Series Fall 2026 - Denver, CO

Denver, CO

Outside4.0 mi2.0 mi1 mile

Sat, Sep 12, 2026

RMRR Fall Marathon Training Series #2

Thornton, CO

Outside12.4 mi18.6 mi

Sat, Sep 12, 2026

Honey Bee Hustle

Loveland, CO

Sat, Sep 12, 2026

9/11 Heroes Run - Denver, Colorado

Denver, CO

Sat, Sep 12, 2026

Colorado Run for the Fallen Run/Walk/Ruck

Palmer Lake, CO

Sat, Sep 12, 2026

Springs Kids Triathlon

Colorado Springs, CO

Sat, Sep 12, 2026

31st El Grito 5k (2026)

Denver, CO

Sat, Sep 12, 2026

FalconTri

U S A F Academy, CO

Sat, Sep 12, 2026

Mad Dash 5K

Milliken, CO

Outside35.0 mi50.0 mi70.0 mi100.0 mi

Sat, Sep 12, 2026

Buffalo Bicycle Classic

Boulder, CO

Sat, Sep 12, 2026

RMRR September 5k/10k

Thornton, CO

Outside10K5K

Thu, Sep 17, 2026

Severance Glow 5K Run or Walk

Severance, CO

Fri, Sep 18, 2026

Gummball 5K

Brighton, CO

OutsideMarathon10K5K1000 m

Fri, Sep 18, 2026

Autumn Run

Buena Vista, CO

Fri, Sep 18, 2026

Miles 4 Madison 5K & 1K

Littleton, CO

Outside5K998 m

Fri, Sep 18, 2026

All-Out Fall Fest

Westminster, CO

Fri, Sep 18, 2026

Lederhosen Race 2026

Red Feather Lakes, CO

Outside3.6 mi

Fri, Sep 18, 2026

2026 ColorFest Color Run/Walk 5K

Pagosa Springs, CO

Fri, Sep 18, 2026

2026 Montbello Alive! 5K

Denver, CO

Fri, Sep 18, 2026

Champions for Children 5K Run/Walk

Commerce City, CO

Outside76.0 mi47.2 mi35.0 mi

Fri, Sep 18, 2026

Salida Bike Fest - Salida 76 and the Banana Belt

Salida, CO

Fri, Sep 18, 2026

Denver: Walk With Autism and Resource Fair

Denver, CO

Outside3.7 mi5K

Fri, Sep 18, 2026

Wellington STAR Foundation 5K 10K

Wellington, CO

Fri, Sep 18, 2026

Stride for Hope 5K and Kids Fun Run

Delta, CO

Fri, Sep 18, 2026

CEROX + IRON + IRON X

Frederick, CO

Outside5K1.2 mi1.9 mi2.5 mi

Fri, Sep 18, 2026

Beulah Challenge and OverIt Series

Beulah, CO

Outside10K5K32.4 mi

Fri, Sep 18, 2026

Battle by the Brook

Deckers, CO

Outside20.0 mi6.0 mi

Fri, Sep 18, 2026

Pikes Peak Ascent

Manitou Springs, CO

Outside13.3 mi

Sat, Sep 19, 2026

20th Annual Golden Gallop

Golden, CO

Outside5K10K12.4 mi

Sat, Sep 19, 2026

Expo Park XC Runs

Aurora, CO

Sat, Sep 19, 2026

Fall Equinox

Fort Collins, CO

OutsideMarathon5.0 mi

Sat, Sep 19, 2026

Chile & Frijole Hot to Trot 5K & 10K

Pueblo, CO

Sat, Sep 19, 2026

Connection 5k

CARBONDALE, CO

Sat, Sep 19, 2026

Pikes Peak Marathon

Manitou Springs, CO

Sat, Sep 19, 2026

Farmers 5000

Wheat Ridge, CO

Sun, Sep 20, 2026

Mountain Lions XC Program

Boulder, CO

Outside50.0 mi31.1 miMarathon94.0 mi

Tue, Sep 22, 2026

CG Adventure Club - Elevation Everest

Winter Park, CO

Outside22.0 mi42.0 mi

Thu, Sep 24, 2026

Red Feather Trail Jamboree

Red Feather Lakes, CO

Thu, Sep 24, 2026

2026 Skate for Chicken

Colorado Springs, CO

Thu, Sep 24, 2026

Boggy Draw Bear Chase

Dolores, CO

Outside1.9 mi5K

Fri, Sep 25, 2026

West Line Winder

Buena Vista, CO

Outside31.1 mi18.6 mi

Fri, Sep 25, 2026

HRCA Oktoberfest 5K

Littleton, CO

Outside103.0 mi73.0 mi110.0 mi

Fri, Sep 25, 2026

Mountains to the Desert Classic

Telluride, CO

Fri, Sep 25, 2026

25th Annual Black Canyon Triathlon

Montrose, CO

Fri, Sep 25, 2026

Denver Rotary Club Cycling to Serve 2026

Denver, CO

Fri, Sep 25, 2026

Mesa County Search & Rescue 5K

Fruita, CO

Fri, Sep 25, 2026

NIGHT NATION RUN - DENVER

Commerce City, CO

Outside31.0 mi15.0 mi62.0 mi

Fri, Sep 25, 2026

Estes Epic

Estes Park, CO

Fri, Sep 25, 2026

Oktoberfest Run 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Fri, Sep 25, 2026

Run for Donuts 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Fri, Sep 25, 2026

OUTLAST COLORADO SPRINGS

Colorado Springs, CO

Outside18.0 mi

Fri, Sep 25, 2026

Run For Your Flapjacks 5K

Oak Creek, CO

Fri, Sep 25, 2026

Mountain Marmot Trail Run presented by Durango Running Company

Durango, CO

Outside12.0 mi

Fri, Sep 25, 2026

McGinn Memorial Cross Country Challenge

Pagosa Springs, CO

Outside1.9 mi5K

Fri, Sep 25, 2026

Runway 5K - Run for the Angels

Broomfield, CO

Fri, Sep 25, 2026

Lisa Nelson’s Mustang Stampede 5K

Arvada, CO

Fri, Sep 25, 2026

Parker Parks and Recreation So Long to Summer 5K/10K

Parker, CO

Outside8.0 mi16.8 mi31.1 mi50.0 mi

Fri, Sep 25, 2026

Sangre de Cristo Trail Festival

Westcliffe, CO

Sat, Sep 26, 2026

Sawatch Ascent

Nathrop, CO

Outside31.1 mi

Sat, Sep 26, 2026

Greenland Open Space Pack Burro Race presented by Double Rainbow Ranch (8 Mile and 3 Mile)

Larkspur, CO

Outside8.0 mi3.0 mi

Sat, Sep 26, 2026

WWE ANNUAL RUN WITH THE WOLVES

Arvada, CO

Sat, Sep 26, 2026

14er Fest 14K & 5K

Buena Vista, CO

Outside8.7 mi5K

Sat, Sep 26, 2026

RMRR Fall Marathon Training Series #3

Thornton, CO

Outside10.0 mi20.0 mi

Sat, Sep 26, 2026

Grand Valley Brew Runs

Grand Junction, CO

Sat, Sep 26, 2026

Joy & Justice 5k

Timnath, CO

Sat, Sep 26, 2026

Pat Mahan Memorial Foundation 5K

Wiggins, CO

Outside4.0 mi2.0 mi1 mile

Sat, Sep 26, 2026

Running for Children's Rights to Both Parents - 9 of 50 Half Marathons in 50 States - Colorado

Boulder, CO

OutsideMarathon5K10K

Sat, Sep 26, 2026

Healthy Kids Running Series Fall 2026 - La Junta, CO

La Junta, CO

Sat, Sep 26, 2026

Colorado Coyotes Youth XC Invitational

Cenennial, CO

Outside1.2 mi1.9 mi2.5 mi

Sat, Sep 26, 2026

Flyin' Lion 5K

Littleton, CO

Outside5K8.0 miMarathon10K

Thu, Oct 1, 2026

Water For People World Water Classic

Anywhere, CO

Outside3.7 mi37.3 mi

Fri, Oct 2, 2026

HRCA Wildcat Mountain Trail Races

Littleton, CO

Outside10.0 mi10K

Fri, Oct 2, 2026

Rim to Rim Royal Gorge Races: 5K Road Run, Trail 8 Mile, Trail Half Marathon

Canon City, CO

Fri, Oct 2, 2026

Homecoming 5K - Colorado State University

Fort Collins, CO

Fri, Oct 2, 2026

Splashland Triathlon

Alamosa, CO

Fri, Oct 2, 2026

Spooky Sprint - Denver

Littleton, CO

Fri, Oct 2, 2026

Lafayette Music Fest -5K - 10K

Lafayette, CO

Outside10K5K

Fri, Oct 2, 2026

OUTLAST DENVER

Littleton, CO

Outside18.0 mi

Fri, Oct 2, 2026

FAMpoint5k

Grand Junction, CO

Outside500 m

Fri, Oct 2, 2026

Big Waves Family 5K run/walk

Westminster, CO

Fri, Oct 2, 2026

I Can 5k

Thornton, CO

Fri, Oct 2, 2026

PRA Miner Gold Rush

Broomfield, CO

Fri, Oct 2, 2026

Emerald Mountain Trail Run

Steamboat Springs, CO

Outside7.5 mi4.0 mi

Fri, Oct 2, 2026

Colorado Springs Marathon, Half, 5K, and Kids K

Colorado Springs, CO

OutsideMarathon5K1000 m

Sat, Oct 3, 2026

RMRR October 5k/8mi

Aurora, CO

Outside8.0 mi5K

Sat, Oct 3, 2026

Liberty Energy 5K - Benefiting the Bettering Human Lives Foundation

Denver, CO

Sat, Oct 3, 2026

Rubey Rescue Run

Aspen, CO

Outside3.5 mi1 mile

Sat, Oct 3, 2026

OTILLO Swimrun Colorado

Fort Collins, CO

Sat, Oct 3, 2026

Evergreen Mountain Weeknight Race

Evergreen, CO

Sat, Oct 3, 2026

Kids' Fall Series - Where Kids Run Free!

Colorado Springs, CO

Outside3.8 mi4.0 mi5.4 mi7.3 mi

Sat, Oct 3, 2026

Fall Series - Get Dirty! Get Muddy!

Colorado Springs, CO

Sat, Oct 3, 2026

Windsor Marathon, Half Marathon, 10k, 5k & 1 Mile Run

Windsor, CO

OutsideMarathon10K5K1 mile

Fri, Oct 9, 2026

Dialysis Dash 5K

Grand Junction, CO

Fri, Oct 9, 2026

Manitou 5K

Manitou Springs, CO

Fri, Oct 9, 2026

Kipling Villas 5K - 2026

Littleton, CO

OutsideMarathon10K5K1 mile

Fri, Oct 9, 2026

Breckenridge RunFest

Breckenridge, CO

Fri, Oct 9, 2026

Footsteps for Families 5k Fun Run & Concert

Windsor, CO

Fri, Oct 9, 2026

Flying Falcon Downhill Mile

USAF Academy, CO

Fri, Oct 9, 2026

Bagel Run 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Fri, Oct 9, 2026

Coffee Lovers Run 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Fri, Oct 9, 2026

The Long View Marathon

Fort Collins, CO

Fri, Oct 9, 2026

Suffer Better 10th Annual Fall Trail Runs

Pine, CO

Outside31.1 mi15.5 mi5K

Sat, Oct 10, 2026

Westy Half & 5k

Westminster, CO

Outside1.9 mi2.5 mi1.2 mi

Sat, Oct 10, 2026

EDT XC Showdown

Aurora, CO

Sat, Oct 10, 2026

Durango Marathon

Durango, CO

Sat, Oct 10, 2026

The Moony Pride 5k

Fort Collins, CO

Sat, Oct 10, 2026

Your Story Isn't Over 5k/10k/Kids 1-Mile

Littleton, CO

Outside1 mile10K5K

Thu, Oct 15, 2026

Whistle Pig Invitational

Craig, CO

Fri, Oct 16, 2026

Blue Sky Trail Marathon & Half Marathon

Fort Collins, CO

Outside26.7 mi13.8 mi

Fri, Oct 16, 2026

Witch Paddle

Littleton, CO

Fri, Oct 16, 2026

Living Water 5K and Family Fun Run

Denver, CO

Outside3.2 mi

Fri, Oct 16, 2026

The Great Pumpkin Haul

Fruita, CO

Outside5.5 mi15.0 mi35.0 mi54.0 mi

Fri, Oct 16, 2026

Chili Chase

Durango, CO

Outside6.5 mi

Fri, Oct 16, 2026

The Great Trailhead Foot Race 5 & 10 Miler

Lakewood, CO

Outside5.0 mi10.0 mi

Fri, Oct 16, 2026

Indian Creek Trail Runs

Sedalia, CO

Sat, Oct 17, 2026

Beti Bike Bash

Denver, CO

Sat, Oct 17, 2026

Halloween Hustle for Charity

Glenwood Springs, CO

Outside1500 m3.4 mi

Sat, Oct 17, 2026

The Palmer Lake .5K (Yes "Point" 5)

Palmer Lake, CO

Tue, Oct 20, 2026

DU Crimson Classic 5K Run/1.5 Mile Walk

Denver, CO

Outside5K1.5 mi

Fri, Oct 23, 2026

Apex Foundation Trick or Trot 5K & Halloween Hunt Powered by REP Fitness

Arvada, CO

Fri, Oct 23, 2026

YMCA of Pueblo Race Series

Pueblo, CO

Fri, Oct 23, 2026

YMCA of Pueblo Spooky Sprint 5K

Pueblo, CO

Fri, Oct 23, 2026

Race to Cure Sarcoma Denver

Denver, CO

Fri, Oct 23, 2026

Zedikiah Scholarship 5K

Denver, CO

Fri, Oct 23, 2026

Mancos Cowboy Half Marathon, 5K, and Fun Run

Mancos, CO

OutsideMarathon5K1 mile

Fri, Oct 23, 2026

YMCA Creepy Crawl 5K presented by Corwin Honda

Palmer Lake, CO

Outside5K1287 m

Sat, Oct 24, 2026

Ghosts and Goblins 5K/10K

Denver, CO

Sat, Oct 24, 2026

The 14th Annual Odyssey Odyssey - 2026

Denver, CO

Fri, Oct 30, 2026

Halloween Fun Run 5k & 1mile - Zombie Theme

Idaho Springs, CO

Outside1 mile5K10KMarathon

Fri, Oct 30, 2026

Spooky Sprint - Colorado Springs

Colorado Springs, CO

Fri, Oct 30, 2026

I Ain't Scared (of 5k)

Thornton, CO

Fri, Oct 30, 2026

PB&J Fuel Run 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Fri, Oct 30, 2026

Halloween Trick or Trot Run 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Fri, Oct 30, 2026

Foundry Halloween 5k

Steamboat Springs, CO

Sat, Oct 31, 2026

RMRR November 5k/15k

Denver, CO

Outside9.3 mi5K

Sat, Oct 31, 2026

All-Out Kooky-Spooky

Golden, CO

Sat, Oct 31, 2026

Girls on the Run Northern Colorado Fall 5K

Fort Collins, CO

Sat, Oct 31, 2026

Feet for Justice Run

Denver, CO

Outside10K5K

Fri, Nov 6, 2026

HRCA Backcountry Wilderness Half Marathon

Lone Tree, CO

Fri, Nov 6, 2026

Alamosa Veterans Memorial Park Race

Alamosa, CO

Fri, Nov 6, 2026

Turkey Trails- Denver

Littleton, CO

Fri, Nov 6, 2026

Colorado 24 Hour Run

Fort Collins, CO

Fri, Nov 6, 2026

Bell Ringer 2 Miler

Loveland, CO

Fri, Nov 6, 2026

City Park Classic (5k/10k & 1 Mile Walk of Hope for Pancreatic Cancer Research)

Denver, CO

Outside5K10K1 mile

Sat, Nov 7, 2026

Turkey Trails - Colorado Springs

Colorado Springs, CO

Sat, Nov 7, 2026

Colorado Springs Veterans Day 5k

Colorado Springs, CO

Outside1.2 mi1.9 mi2.5 mi

Sat, Nov 7, 2026

Canya Cañon Trail Race & Hike

Colorado Springs, CO

Outside4.0 mi2.5 mi

Fri, Nov 13, 2026

Colorado State Youth Cross Country Championships

Aurora, CO

Fri, Nov 13, 2026

Run for Mental Health 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Fri, Nov 13, 2026

Veterans Day Freedom Run 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Fri, Nov 13, 2026

Denver Veterans Day Run

Denver, CO

Sat, Nov 14, 2026

Girls on the Run Denver Metro 5K

Denver, CO

OutsideMarathon10K5K1.2 mi

Fri, Nov 20, 2026

TURKEY TREK (13.1, 10k, 5k & 2k)

Arvada, CO

Fri, Nov 20, 2026

Pumpkin Pie 5K/10K

Denver, CO

Wed, Nov 25, 2026

Huffin' for Stuffin' 2-Mile Fun Run

Loveland, CO

Wed, Nov 25, 2026

The Pilgrimage Run 2026

Erie, CO

Outside2.0 mi4.0 mi

Wed, Nov 25, 2026

Parker Parks and Recreation Turkey Day 5K FUN Run/Walk

Parker, CO

Wed, Nov 25, 2026

Buena Vista Turkey Trot 5K & Family Fun Run

Buena Vista, CO

Outside1 mile5K

Wed, Nov 25, 2026

2026 Loveland Turkey Trot

Loveland, CO

Wed, Nov 25, 2026

Pelican Lakes Turkey Trot

Windsor, CO

Wed, Nov 25, 2026

Alpine Bank Boulder Thanksgiving Day 5K

Boulder, CO

Outside5K800 m

Wed, Nov 25, 2026

Broomfield Turkey Day 5K/10K

Broomfield, CO

Outside10K5K2.0 mi

Wed, Nov 25, 2026

NCMC Turkey Trot

Greeley, CO

Outside5K1.2 mi

Wed, Nov 25, 2026

YMCA Turkey Trot 5K presented by Corwin Honda

Colorado Springs, CO

Outside5K998 m

Wed, Nov 25, 2026

AdventHealth Avista Louisville Turkey Trot

Louisville, CO

Wed, Nov 25, 2026

YMCA of Pueblo Turkey Trot

Pueblo, CO

Wed, Nov 25, 2026

Gobble Wobble Run 2026

Littleton, CO

Thu, Nov 26, 2026

Christmas Mountain 5 Mile Run

Salida, CO

Outside5.0 mi1 mile

Fri, Nov 27, 2026

Coffee Lovers Run 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Fri, Nov 27, 2026

Thanksgiving Gobble Trot Run 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Fri, Dec 4, 2026

All-Out Fa La La

Westminster, CO

Fri, Dec 4, 2026

Candy Cane Course - Colorado Springs

Colorado Springs, CO

Fri, Dec 4, 2026

Onesie Dash

Red Feather Lakes, CO

Outside5K6.0 mi10.0 mi21.0 mi

Fri, Dec 4, 2026

Chasing Santa 5k/Cycling Santa Toy Drive Presented by: Springs Law Group

Colorado Springs, CO

Fri, Dec 4, 2026

Toy Drop

Loveland, CO

Outside5K10K9.3 mi

Fri, Dec 4, 2026

Sawmill Trail Runs

Pine, CO

Outside8.1 mi16.1 mi31.7 mi

Fri, Dec 4, 2026

2026 Summit for Life

Aspen, CO

Outside2.5 mi

Sat, Dec 5, 2026

RMRR December 4.5mi

Denver, CO

Outside4.5 mi

Sat, Dec 5, 2026

Candy Cane Course - Denver

Westminster, CO

Outside1 mile5K10K50 m

Sat, Dec 5, 2026

Rock Canyon Half Marathon- 40th Anniversary Run!

Pueblo, CO

Fri, Dec 11, 2026

WinterFest 5k & Fun Run

Thornton, CO

Outside5K1200 m

Fri, Dec 11, 2026

Santa Shuffle 5K

Littleton, CO

Fri, Dec 11, 2026

Run for Breast Cancer 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Fri, Dec 11, 2026

Sunrise Marathon 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Fri, Dec 11, 2026

YMCA Jingle Jog 5K presented by Corwin Honda

Fountain, CO

Outside5K1287 m

Fri, Dec 11, 2026

Santa Catch 5k & 10k

Windsor, CO

Outside5K10K1 mile

Sat, Dec 12, 2026

2026 Jingle Bell Run - Colorado

Denver, CO

Outside5K1 mile100 m

Fri, Dec 18, 2026

Santa's Dash for Ca$h

Denver, CO

Fri, Dec 18, 2026

Sweaty Sweater 5k

Fort Collins, CO

Sat, Dec 19, 2026

Ugly Sweater 5K

Denver, CO

Fri, Dec 25, 2026

A Merry Christmas Run 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Fri, Dec 25, 2026

New Year's Run 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Wed, Dec 30, 2026

Hands & Voices New Year Virtual 5K: Trails to the Summit

Boulder, CO

Wed, Dec 30, 2026

James Pre-Paid Teams Test

Lyons, CO

Outside7.5 mi

Wed, Dec 30, 2026

run.Windsor Gift Cards

Windsor, CO

Wed, Dec 30, 2026

Resolution Run - Fort Collins

Fort Collins, CO

Thu, Dec 31, 2026

Resolute Runner 5k

Arvada, CO

Fri, Jan 1, 2027

YMCA of Pueblo Hot Chocolate 5K

Pueblo, CO

Fri, Jan 8, 2027

All-Out Polar Prowl

Arvada, CO

Fri, Jan 15, 2027

ALMAGEDDON Winter Triathlon presented by the Alma Foundation

Alma, CO

Outside12.5 mi

Fri, Jan 15, 2027

MLK Jr. Freedom Run 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Fri, Jan 15, 2027

Sunrise Marathon 5K/10K/13.1 DENVER/AURORA

Centennial, CO

OutsideMarathon10K5K1.9 mi

Fri, Jan 29, 2027

Alley Loop

Crested Butte, CO

Fri, Jan 29, 2027

Coffee Lover Run DENVER/AURORA

Centennial, CO

Fri, Jan 29, 2027

Run for Donut DENVER/AURORA

Centennial, CO

Fri, Feb 5, 2027

All-Out Mardi Crawl

Arvada, CO

Outside6.7 miMarathon19.6 mi

Fri, Feb 5, 2027

Stories Trail Runs

Colorado Springs, CO

Fri, Feb 12, 2027

Valentine's Day Run 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Fri, Feb 12, 2027

Run for Chocolate 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Fri, Feb 12, 2027

Heart Throb 5k

Arvada, CO

Sat, Feb 13, 2027

Gothic Mountain Tour

Crested Butte, CO

Outside18.0 mi24.0 mi

Sat, Feb 13, 2027

The Toyota Super Half Marathon™& Game Day 5K™

Colorado Springs, CO

Sat, Feb 27, 2027

Highlands Ranch 5k

Highlands Ranch, CO

Fri, Mar 12, 2027

22nd Annual Run Through Time Trail Marathon and Half Marathon

Salida, CO

OutsideMarathon2.0 mi

Fri, Mar 12, 2027

Erin Go Bragh 7.77k

Westminster, CO

Outside4.8 mi

Sat, Mar 13, 2027

Lucky Brew Race 5K, 10K, 15k & Half Marathon

Severance, CO

Outside5K10K9.3 mi966 m

Fri, Mar 19, 2027

Sunrise Marathon 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Sat, Mar 20, 2027

All-Out Spring Fever

Golden, CO

Sat, Mar 20, 2027

Spring Equinox

Wellington, CO

Sat, Mar 27, 2027

Central Park 5k

Denver, CO

Sat, Apr 3, 2027

Donut Dash

Denver, CO

Fri, Apr 9, 2027

Run for Bagels 5K/10K/13.1 DENVER/AURORA

Centennial, CO

Sat, Apr 10, 2027

Platte River Half-Marathon, Relay & 5k

Littleton, CO

Sat, Apr 10, 2027

NoCo Urban Ultra & Relay

Bellvue, CO

Outside50.0 mi100.0 mi

Sat, Apr 17, 2027

Horsetooth Half Marathon - Presented by Fort Collins Connexion

Fort Collins, CO

Fri, Apr 23, 2027

All-Out Beat the Heat

Westminster, CO

Fri, Apr 23, 2027

Bigfoot Half Marathon

Estes Park, CO

Fri, Apr 23, 2027

Coffee Lover Run DENVER/AURORA

Centennial, CO

Sat, Apr 24, 2027

Unicorn 5k (Denver-East)

Denver, CO

Outside31.1 mi15.5 mi8.0 mi4.0 mi

Fri, Apr 30, 2027

18 Hours of Fruita

Loma, CO

Outside7.3 mi

Fri, Apr 30, 2027

Greenland Trail Races

Larkspur, CO

Sat, May 1, 2027

The Colorado Marathon

Fort Collins, CO

Sat, May 1, 2027

Emerge 5K

Boulder, CO

Fri, May 7, 2027

Colterris Wine Run 5k

Palisade, CO

Sat, May 8, 2027

Colorado Women's Classic - Westminster

Westminster, CO

Outside5K10K10.0 mi

Sat, May 8, 2027

Denver Mother's Day 5K

Denver, CO

Outside6.8 mi14.1 mi26.5 mi

Fri, May 14, 2027

Endure Trail Runs

Divide, CO

Fri, May 14, 2027

Vallecito Lake Heavy Half

Bayfield, CO

Outside14.0 mi

Fri, May 21, 2027

Samson's Revenge

Estes Park, CO

Outside6.5 mi15.5 mi31.1 mi

Fri, Jun 4, 2027

Weld Your Mettle Running Festival

Eaton, CO

Outside50.0 mi62.1 mi4.3 mi14.0 mi

Sat, Jun 5, 2027

Colorado 13er (Half Marathon/10k/5k)

Louisville, CO

Sat, Jun 5, 2027

Flamingo Day 5K

Denver, CO

Fri, Jun 11, 2027

All-Out Summer Breeze

Arvada, CO

Outside88.0 mi54.0 mi28.0 mi16.0 mi

Fri, Jun 11, 2027

KowTown Gravel

Kremmling, CO

Fri, Jun 11, 2027

Summits Trail Runs

Granby, CO

Outside6.1 mi13.9 mi27.8 mi33.9 mi

Fri, Jun 18, 2027

Unicorn 5k (North)

Thornton, CO

Outside38.0 mi26.0 miMarathon22.0 mi

Wed, Jun 23, 2027

Race in the Clouds - Alma Dirt Festival 2027

Alma, CO

Fri, Jul 2, 2027

Red, White, and WARRIOR 5K

Grand Junction, CO

Outside5K400 m

Sat, Jul 3, 2027

Let Freedom Run 5k/10k - Louisville

Louisville, CO

Outside10.8 mi19.1 mi38.3 mi53.8 mi

Thu, Jul 8, 2027

Silverheels Trail Runs

Como, CO

Fri, Jul 9, 2027

All-Out Dog Days

Westminster, CO

Fri, Jul 9, 2027

Cookie Chase

Denver, CO

Fri, Jul 16, 2027

Summer Splash Prairie Dog Half, 10k, & 5k

Castle Rock, CO

Sat, Jul 24, 2027

Spirit of the West 5K Run/Walk

Golden, CO

Outside5K50 m

Fri, Aug 6, 2027

Kennebec Mountain Run

Hesperus, CO

Outside15.0 mi

Fri, Aug 6, 2027

RoC & Roll 5K: Run, Walk, or Wheel

Fountain, CO

Thu, Feb 9, 2034

50 States Half Marathon Club General Membership

Colorado Springs, CO

Fri, Feb 10, 2034

Fifty States Half Marathon Club Life Membership

Colorado Springs, CO