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Race calendar

5K Races in Colorado

242 upcoming 5K races across Colorado. Run This events are listed first — pick a city below to narrow it down.

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242 races

Thu, Aug 6, 2026

Choice City Running Festival

Fort Collins, CO

Outside1 mileMarathon10K5K

Thu, Aug 6, 2026

RMRR August 5km and picnic

Centennial, CO

Outside5K

Fri, Aug 7, 2026

Summer Sizzler- Denver

Thornton, CO

Outside50 m1 mile5K10K

Fri, Aug 7, 2026

Escalante Days 5K

Dolores, CO

Outside5K

Fri, Aug 7, 2026

All-Out Runapalooza

Arvada, CO

OutsideMarathon10K5K

Fri, Aug 7, 2026

Dog Days of Summer

Longmont, CO

Outside3.5 mi1000 m

Fri, Aug 7, 2026

5K at the Fair

Durango, CO

Outside5K

Fri, Aug 7, 2026

Arapahoe Warrior 5K

Centennial, CO

Outside5K

Sat, Aug 8, 2026

Summer Sizzler- Colorado Springs

Colorado Springs, CO

Outside50 m1 mile5K10K

Sat, Aug 8, 2026

The Bullfrog Summer Surge

Lakewood, CO

Outside5K805 m

Sat, Aug 8, 2026

Pancake Stampede 5K

Littleton, CO

Outside5K

Fri, Aug 14, 2026

Sunrise Stampede

Longmont, CO

Outside5K1 mile

Fri, Aug 14, 2026

Miles for Migraine Colorado

Denver, CO

Outside2.0 mi5K

Fri, Aug 14, 2026

CWCS 5K Color Fun Run

Montrose, CO

Outside5K

Fri, Aug 14, 2026

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

Centennial, CO

Outside5K10KMarathon1 mile

Fri, Aug 14, 2026

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

Centennial, CO

Outside5K10KMarathon1 mile

Fri, Aug 14, 2026

Frontier Academy Community 5K

Greeley, CO

Outside5K

Fri, Aug 14, 2026

Yuma Police Department Donut 5k

Yuma, CO

Outside5K

Fri, Aug 14, 2026

The Cheyenne Mountain Run

Colorado Springs, CO

Outside5K10K14.0 mi

Sat, Aug 15, 2026

Erie Half & 5k

Erie, CO

OutsideMarathon5K

Sat, Aug 15, 2026

Cancer League of Colorado Race 4 Research

Denver, CO

Outside5K

Mon, Aug 17, 2026

Into the Hills Eltuck 5k

Bellvue, CO

Outside5K

Fri, Aug 21, 2026

Coyote Chase 5k

Louisville, CO

Outside5K

Fri, Aug 21, 2026

Warrior Waterfront 5K

Grand Junction, CO

Outside5K

Fri, Aug 21, 2026

Ram Run

Denver, CO

Outside5K1 mile

Fri, Aug 21, 2026

Jog in the Bog 5k

Westminster, CO

Outside5K

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

Outside5K10K

Sat, Aug 22, 2026

2026 PH in the Park

Denver, CO

Outside5K1 mile

Sat, Aug 22, 2026

Rebel Run 5k

Denver, CO

Outside5K2.0 mi

Sat, Aug 22, 2026

Pioneer Prairie Dog Half, 10k & 5k

Westminster, CO

OutsideMarathon10K5K

Sat, Aug 22, 2026

11th Annual Log Hill Hustle

Ridgway, CO

Outside5K10K

Fri, Aug 28, 2026

RexRun For PAWSitivity 2026 Trail Run/Walk

Aurora, CO

Outside5K1 mile

Fri, Aug 28, 2026

Rocky Mountain 5K presented by School District 11

Colorado Springs, CO

Outside5K1000 m

Fri, Aug 28, 2026

Historic Elizabeth Main Street 5K & Family Color Run

Elizabeth, CO

Outside5K1 mile

Fri, Aug 28, 2026

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

Centennial, CO

Outside5K10KMarathon1 mile

Fri, Aug 28, 2026

Run for Hope - Colorado Springs

Colorado Springs, CO

Outside5K1 mile

Fri, Aug 28, 2026

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

Centennial, CO

Outside5K10KMarathon1 mile

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

Waneka Classic 5K

Lafayette, CO

Outside5K

Sat, Aug 29, 2026

Wine Run 5k at The Winery at Holy Cross Abbey

Canon City, CO

Outside5K

Sat, Aug 29, 2026

James Test Site

Lyons, CO

Outside5K10K

Tue, Sep 1, 2026

4th Annual Roost Rebellion Relays

Denver, CO

Outside3.2 mi

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

Outside5K10K

Fri, Sep 4, 2026

Demon Dash

Arvada, CO

Outside5K

Fri, Sep 4, 2026

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

Westminster, CO

Outside50 m1 mile5K10K

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

Outside5K

Sat, Sep 5, 2026

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

Colorado Springs, CO

Outside50 m1 mile5K10K

Sun, Sep 6, 2026

Oak Creek No Fun Run

Oak Creek, CO

Outside5K

Sun, Sep 6, 2026

FCA All-Abilities Labor Day 5K

Loveland, CO

Outside5K1 mile

Sun, Sep 6, 2026

Labor Day Half Marathon

Parker, CO

OutsideMarathon10K5K

Wed, Sep 9, 2026

14th Annual Superhero Event

Greeley, CO

Outside10K5K1 mile

Thu, Sep 10, 2026

Res Hill Ruck

Pagosa Springs, CO

Outside3.2 mi

Fri, Sep 11, 2026

Spirit of the Valley 5k

Grand Junction, CO

Outside5K1000 m

Fri, Sep 11, 2026

Tater Trot 5K

Monte Vista, CO

Outside5K

Fri, Sep 11, 2026

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

Centennial, CO

Outside5K10KMarathon1 mile

Fri, Sep 11, 2026

For The City Network 5K

Greeley, CO

Outside5K

Fri, Sep 11, 2026

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

Centennial, CO

Outside5K10KMarathon1 mile

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

Outside5K

Fri, Sep 11, 2026

6 Dot Dash

Littleton, CO

Outside5K

Sat, Sep 12, 2026

Tiger Prowl 5K

Denver, CO

Outside5K

Sat, Sep 12, 2026

9/11 Heroes Run - Denver, Colorado

Denver, CO

Outside5K1 mile

Sat, Sep 12, 2026

31st El Grito 5k (2026)

Denver, CO

Outside5K

Sat, Sep 12, 2026

Mad Dash 5K

Milliken, CO

Outside5K

Sat, Sep 12, 2026

RMRR September 5k/10k

Thornton, CO

Outside10K5K

Thu, Sep 17, 2026

Severance Glow 5K Run or Walk

Severance, CO

Outside5K

Fri, Sep 18, 2026

Gummball 5K

Brighton, CO

Outside5K

Fri, Sep 18, 2026

Autumn Run

Buena Vista, CO

OutsideMarathon10K5K1000 m

Fri, Sep 18, 2026

Miles 4 Madison 5K & 1K

Littleton, CO

Outside5K998 m

Fri, Sep 18, 2026

All-Out Fall Fest

Westminster, CO

OutsideMarathon10K5K

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

Outside5K

Fri, Sep 18, 2026

2026 Montbello Alive! 5K

Denver, CO

Outside5K

Fri, Sep 18, 2026

Champions for Children 5K Run/Walk

Commerce City, CO

Outside5K

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

Outside5K10K

Fri, Sep 18, 2026

Stride for Hope 5K and Kids Fun Run

Delta, CO

Outside5K1 mile

Fri, Sep 18, 2026

Beulah Challenge and OverIt Series

Beulah, CO

Outside10K5K32.4 mi

Sat, Sep 19, 2026

20th Annual Golden Gallop

Golden, CO

Outside5K10K12.4 mi

Sat, Sep 19, 2026

Expo Park XC Runs

Aurora, CO

Outside5K1.2 mi1.9 mi2.5 mi

Sat, Sep 19, 2026

Chile & Frijole Hot to Trot 5K & 10K

Pueblo, CO

Outside5K10K

Sat, Sep 19, 2026

Connection 5k

CARBONDALE, CO

Outside5K

Sat, Sep 19, 2026

Farmers 5000

Wheat Ridge, CO

Outside5K

Thu, Sep 24, 2026

Boggy Draw Bear Chase

Dolores, CO

Outside1.9 mi5K

Fri, Sep 25, 2026

HRCA Oktoberfest 5K

Littleton, CO

Outside5K

Fri, Sep 25, 2026

25th Annual Black Canyon Triathlon

Montrose, CO

Outside5K

Fri, Sep 25, 2026

Mesa County Search & Rescue 5K

Fruita, CO

Outside5K

Fri, Sep 25, 2026

NIGHT NATION RUN - DENVER

Commerce City, CO

Outside5K

Fri, Sep 25, 2026

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

Centennial, CO

Outside5K10KMarathon1 mile

Fri, Sep 25, 2026

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

Centennial, CO

Outside5K10KMarathon1 mile

Fri, Sep 25, 2026

Run For Your Flapjacks 5K

Oak Creek, CO

Outside5K

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

Outside5K

Fri, Sep 25, 2026

Lisa Nelson’s Mustang Stampede 5K

Arvada, CO

Outside5K

Fri, Sep 25, 2026

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

Parker, CO

Outside5K10K

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

Outside5K1000 m

Sat, Sep 26, 2026

14er Fest 14K & 5K

Buena Vista, CO

Outside8.7 mi5K

Sat, Sep 26, 2026

Grand Valley Brew Runs

Grand Junction, CO

Outside5K

Sat, Sep 26, 2026

Joy & Justice 5k

Timnath, CO

Outside5K1 mile

Sat, Sep 26, 2026

Pat Mahan Memorial Foundation 5K

Wiggins, CO

Outside5K

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

Flyin' Lion 5K

Littleton, CO

Outside5K

Thu, Oct 1, 2026

Water For People World Water Classic

Anywhere, CO

Outside3.7 mi37.3 mi

Fri, Oct 2, 2026

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

Canon City, CO

Outside5K8.0 miMarathon10K

Fri, Oct 2, 2026

Homecoming 5K - Colorado State University

Fort Collins, CO

Outside5K

Fri, Oct 2, 2026

Spooky Sprint - Denver

Littleton, CO

Outside50 m1 mile5K10K

Fri, Oct 2, 2026

Lafayette Music Fest -5K - 10K

Lafayette, CO

Outside10K5K

Fri, Oct 2, 2026

Big Waves Family 5K run/walk

Westminster, CO

Outside5K

Fri, Oct 2, 2026

I Can 5k

Thornton, CO

Outside5K

Fri, Oct 2, 2026

PRA Miner Gold Rush

Broomfield, CO

Outside5K1 mile

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

Outside5K1000 m

Sat, Oct 3, 2026

Rubey Rescue Run

Aspen, CO

Outside3.5 mi1 mile

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

Outside5K

Fri, Oct 9, 2026

Manitou 5K

Manitou Springs, CO

Outside5K

Fri, Oct 9, 2026

Kipling Villas 5K - 2026

Littleton, CO

Outside5K

Fri, Oct 9, 2026

Breckenridge RunFest

Breckenridge, CO

OutsideMarathon10K5K1 mile

Fri, Oct 9, 2026

Footsteps for Families 5k Fun Run & Concert

Windsor, CO

Outside5K

Fri, Oct 9, 2026

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

Centennial, CO

Outside5K10KMarathon1 mile

Fri, Oct 9, 2026

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

Centennial, CO

Outside5K10KMarathon1 mile

Fri, Oct 9, 2026

The Long View Marathon

Fort Collins, CO

OutsideMarathon5K

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

OutsideMarathon5K

Sat, Oct 10, 2026

The Moony Pride 5k

Fort Collins, CO

Outside5K

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

Outside5K

Fri, Oct 16, 2026

Living Water 5K and Family Fun Run

Denver, CO

Outside3.2 mi

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

Outside5K

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

Outside5K1 mile

Fri, Oct 23, 2026

YMCA of Pueblo Race Series

Pueblo, CO

Outside5K

Fri, Oct 23, 2026

YMCA of Pueblo Spooky Sprint 5K

Pueblo, CO

Outside5K

Fri, Oct 23, 2026

Race to Cure Sarcoma Denver

Denver, CO

Outside5K1000 m

Fri, Oct 23, 2026

Zedikiah Scholarship 5K

Denver, CO

Outside5K

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

Outside5K10K

Sat, Oct 24, 2026

The 14th Annual Odyssey Odyssey - 2026

Denver, CO

Outside5K1 mile

Fri, Oct 30, 2026

Halloween Fun Run 5k & 1mile - Zombie Theme

Idaho Springs, CO

Outside5K1 mile

Fri, Oct 30, 2026

Spooky Sprint - Colorado Springs

Colorado Springs, CO

Outside1 mile5K10KMarathon

Fri, Oct 30, 2026

I Ain't Scared (of 5k)

Thornton, CO

Outside5K

Fri, Oct 30, 2026

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

Centennial, CO

Outside5K10KMarathon1 mile

Fri, Oct 30, 2026

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

Centennial, CO

Outside5K10KMarathon1 mile

Fri, Oct 30, 2026

Foundry Halloween 5k

Steamboat Springs, CO

Outside5K

Sat, Oct 31, 2026

RMRR November 5k/15k

Denver, CO

Outside9.3 mi5K

Sat, Oct 31, 2026

All-Out Kooky-Spooky

Golden, CO

OutsideMarathon10K5K

Sat, Oct 31, 2026

Girls on the Run Northern Colorado Fall 5K

Fort Collins, CO

Outside5K

Sat, Oct 31, 2026

Feet for Justice Run

Denver, CO

Outside10K5K

Fri, Nov 6, 2026

Alamosa Veterans Memorial Park Race

Alamosa, CO

Outside5K10K

Fri, Nov 6, 2026

Turkey Trails- Denver

Littleton, CO

Outside50 m1 mile5K10K

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

Outside50 m1 mile5K10K

Sat, Nov 7, 2026

Colorado Springs Veterans Day 5k

Colorado Springs, CO

Outside5K

Fri, Nov 13, 2026

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

Centennial, CO

Outside5K10KMarathon1 mile

Fri, Nov 13, 2026

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

Centennial, CO

Outside5K10KMarathon1 mile

Fri, Nov 13, 2026

Denver Veterans Day Run

Denver, CO

Outside5K10K

Sat, Nov 14, 2026

Girls on the Run Denver Metro 5K

Denver, CO

Outside5K

Fri, Nov 20, 2026

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

Arvada, CO

OutsideMarathon10K5K1.2 mi

Fri, Nov 20, 2026

Pumpkin Pie 5K/10K

Denver, CO

Outside5K10K

Wed, Nov 25, 2026

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

Parker, CO

Outside5K

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

Outside5K

Wed, Nov 25, 2026

Pelican Lakes Turkey Trot

Windsor, CO

Outside5K

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

Outside5K

Wed, Nov 25, 2026

YMCA of Pueblo Turkey Trot

Pueblo, CO

Outside5K

Wed, Nov 25, 2026

Gobble Wobble Run 2026

Littleton, CO

Outside5K

Fri, Nov 27, 2026

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

Centennial, CO

Outside5K10KMarathon1 mile

Fri, Nov 27, 2026

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

Centennial, CO

Outside5K10KMarathon1 mile

Fri, Dec 4, 2026

All-Out Fa La La

Westminster, CO

OutsideMarathon10K5K

Fri, Dec 4, 2026

Candy Cane Course - Colorado Springs

Colorado Springs, CO

Outside50 m1 mile5K10K

Fri, Dec 4, 2026

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

Colorado Springs, CO

Outside5K6.0 mi10.0 mi21.0 mi

Fri, Dec 4, 2026

Toy Drop

Loveland, CO

Outside5K10K9.3 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

OutsideMarathon5K

Fri, Dec 11, 2026

WinterFest 5k & Fun Run

Thornton, CO

Outside5K1200 m

Fri, Dec 11, 2026

Santa Shuffle 5K

Littleton, CO

Outside5K

Fri, Dec 11, 2026

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

Centennial, CO

Outside5K10KMarathon1 mile

Fri, Dec 11, 2026

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

Centennial, CO

Outside5K10KMarathon1 mile

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

Outside5K

Fri, Dec 18, 2026

Sweaty Sweater 5k

Fort Collins, CO

Outside5K1 mile

Sat, Dec 19, 2026

Ugly Sweater 5K

Denver, CO

Outside5K

Fri, Dec 25, 2026

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

Centennial, CO

Outside5K10KMarathon1 mile

Fri, Dec 25, 2026

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

Centennial, CO

Outside5K10KMarathon1 mile

Wed, Dec 30, 2026

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

Boulder, CO

Outside5K

Wed, Dec 30, 2026

Resolution Run - Fort Collins

Fort Collins, CO

Outside5K

Thu, Dec 31, 2026

Resolute Runner 5k

Arvada, CO

Outside5K

Fri, Jan 1, 2027

YMCA of Pueblo Hot Chocolate 5K

Pueblo, CO

Outside5K

Fri, Jan 8, 2027

All-Out Polar Prowl

Arvada, CO

OutsideMarathon10K5K

Fri, Jan 15, 2027

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

Centennial, CO

Outside5K10KMarathon1 mile

Fri, Jan 15, 2027

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

Centennial, CO

Outside5K10KMarathon1 mile

Fri, Jan 29, 2027

Alley Loop

Crested Butte, CO

OutsideMarathon10K5K1.9 mi

Fri, Jan 29, 2027

Coffee Lover Run DENVER/AURORA

Centennial, CO

Outside5K10KMarathon1 mile

Fri, Jan 29, 2027

Run for Donut DENVER/AURORA

Centennial, CO

Outside5K10KMarathon1 mile

Fri, Feb 5, 2027

All-Out Mardi Crawl

Arvada, CO

OutsideMarathon10K5K

Fri, Feb 12, 2027

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

Centennial, CO

Outside5K10KMarathon1 mile

Fri, Feb 12, 2027

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

Centennial, CO

Outside5K10KMarathon1 mile

Fri, Feb 12, 2027

Heart Throb 5k

Arvada, CO

Outside5K

Sat, Feb 13, 2027

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

Colorado Springs, CO

OutsideMarathon5K

Sat, Feb 27, 2027

Highlands Ranch 5k

Highlands Ranch, CO

Outside5K

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

Outside5K10KMarathon1 mile

Sat, Mar 20, 2027

All-Out Spring Fever

Golden, CO

OutsideMarathon10K5K

Sat, Mar 20, 2027

Spring Equinox

Wellington, CO

OutsideMarathon5K

Sat, Mar 27, 2027

Central Park 5k

Denver, CO

Outside5K

Sat, Apr 3, 2027

Donut Dash

Denver, CO

Outside5K

Fri, Apr 9, 2027

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

Centennial, CO

Outside5K10KMarathon1 mile

Sat, Apr 10, 2027

Platte River Half-Marathon, Relay & 5k

Littleton, CO

OutsideMarathon5K

Fri, Apr 23, 2027

All-Out Beat the Heat

Westminster, CO

OutsideMarathon10K5K

Fri, Apr 23, 2027

Bigfoot Half Marathon

Estes Park, CO

OutsideMarathon5K

Fri, Apr 23, 2027

Coffee Lover Run DENVER/AURORA

Centennial, CO

Outside5K10KMarathon1 mile

Sat, Apr 24, 2027

Unicorn 5k (Denver-East)

Denver, CO

Outside5K

Sat, May 1, 2027

The Colorado Marathon

Fort Collins, CO

OutsideMarathon10K5K

Sat, May 1, 2027

Emerge 5K

Boulder, CO

Outside5K

Fri, May 7, 2027

Colterris Wine Run 5k

Palisade, CO

Outside5K

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

Outside5K

Sat, Jun 5, 2027

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

Louisville, CO

OutsideMarathon10K5K

Sat, Jun 5, 2027

Flamingo Day 5K

Denver, CO

Outside5K

Fri, Jun 11, 2027

All-Out Summer Breeze

Arvada, CO

OutsideMarathon10K5K

Fri, Jun 18, 2027

Unicorn 5k (North)

Thornton, CO

Outside5K1000 m

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

Outside5K10K

Fri, Jul 9, 2027

All-Out Dog Days

Westminster, CO

OutsideMarathon10K5K

Fri, Jul 9, 2027

Cookie Chase

Denver, CO

Outside5K

Fri, Jul 16, 2027

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

Castle Rock, CO

OutsideMarathon10K5K

Sat, Jul 24, 2027

Spirit of the West 5K Run/Walk

Golden, CO

Outside5K50 m

Fri, Aug 6, 2027

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

Fountain, CO

Outside5K

5K races by city in Colorado

Denver34Centennial32Colorado Springs13Littleton13Arvada11Westminster11Fort Collins9Pueblo7Thornton6Grand Junction5Boulder4Golden4Greeley4Louisville4Windsor4Aurora3Broomfield3Buena Vista3Loveland3Pagosa Springs3Parker3