Create Your Race Find EventsContact

Run This
Races
Connecticut
Ultra

Race calendar

Ultra Races in Connecticut

14 upcoming Ultra races across Connecticut. Run This events are listed first — pick a city below to narrow it down.

Sort

Search all races

Cities in ConnecticutCornwall

14 races

Thu, Oct 1, 2026

IronHike Mohawk Mountain Fall Series 2026

Mohawk Mtn Ski Area, Cornwall, CT

Outside29.0 mi100.0 mi15.0 mi28.8 mi

Thu, Oct 1, 2026

IronHike Olympus Mons Ultra | Run, Power Hike, Walk. | Mohawk Mountain, Connecticut | Fall | October | Solo - 72,590 feet of elevation gain, possibly more than any endurance event of its kind. - 100 Mile + Elevation Endurance Ultra Trail Marathon - 152 + Miles - 84 Hour - We are redefining race day. Tags: Iron Hike, 100 Miler, Oct, CT, Cornwall, New England, Loop, Ski Slope, Skratch Labs, Hardest Ultra, Hard Ultra

Cornwall, CT

Outside152.0 mi

Thu, Oct 1, 2026

IronHike Olympus Mons Ultra | Run, Power Hike, Walk. | Mohawk Mountain, Connecticut | Fall | October | Trail Buddy Flex Relay (2 Mountain Athletes) - 72,590 feet of elevation gain, possibly more than any endurance event of its kind. - 100 Mile + Elevation Endurance Ultra Trail Marathon - 152 + Miles - 84 Hour - We are redefining race day. Tags: Iron Hike, 100 Miler, Oct, CT, Cornwall, New England, Loop, Ski Slope, Skratch Labs, Hardest Ultra, Hard Ultra

Cornwall, CT

Outside152.0 mi

Thu, Oct 1, 2026

Everest - 60 Mile + (60 Miler) - just over 29029 feet of elevation gain up and down - Everesting Elevation Endurance Ultra Trail Marathon - 61 + Miles | 72 Hour - IronHike (Iron Hike) Fall (October / Oct) - Solo - Mohawk Mountain, Connecticut (CT) - Run, Hike or Walk with us as we redefine race day.

Cornwall, CT

Own a race in Connecticut?

List it on Run This and it shows up right here, where runners are already looking. Run This is any race director's best friend and the most modern platform for your registration. Already listed? Claim it.

Thu, Oct 1, 2026

Everest - 60 Mile + (60 Miler) - just over 29029 feet of elevation gain up and down - Everesting Elevation Endurance Ultra Trail Marathon - 61 + Miles | 72 Hour - IronHike (Iron Hike) Fall (October / Oct) - Relay - Mohawk Mountain, Connecticut (CT) - Run, Hike or Walk with us as we redefine race day.

Cornwall, CT

Thu, Oct 1, 2026

Answer the Bell Full - 100 Mile + (100 Miler) - Complete a 1.2 mile, 600 foot loop every hour, on the hour, for up to 84 hours, until you can no longer answer the bell. - Elevation Endurance Ultra Backyard Trail Marathon - 100 + Miles | 84 Hour - IronHike (Iron Hike) Fall (October / Oct) - Solo - Mohawk Mountain, Connecticut (CT) - Run, hike, or walk with us as we redefine race day.

Cornwall, CT

Fri, Oct 2, 2026

Denali - 40 Mile + (40 Miler) - if you can only spare your whole weekend - Elevation Endurance Ultra Trail Marathon - 43 + Miles | 48 Hour - IronHike (Iron Hike) Fall (October / Oct) - Solo - Mohawk Mountain, Connecticut (CT) - Run, Hike or Walk with us as we redefine race day.

Cornwall, CT

Fri, Oct 2, 2026

Denali - 40 Mile + (40 Miler) - if you can only spare your whole weekend - Elevation Endurance Ultra Trail Marathon - 43 + Miles | 48 Hour - IronHike (Iron Hike) Fall (October / Oct) - Relay - Mohawk Mountain, Connecticut (CT) - Run, Hike or Walk with us as we redefine race day.

Cornwall, CT

Sat, Oct 3, 2026

Iron Hike - Fall Double Kuwohi Trail Marathon Plus - 28+ Miles | 13,685' Elevation | 24-Hour | Run, Hike or Walk

Cornwall, CT

Sat, Oct 3, 2026

Iron Hike - Fall Double Kuwohi Trail Marathon Plus Relay - 28+ Miles | 13,685' Elevation | 24-Hour | Run, Hike or Walk

Cornwall, CT

Sat, Oct 3, 2026

Iron Hike - Fall Answer the Bell Ultra Trail Marathon - Basic (Backyard Ultra Format) - 28+ Miles | 14,400'+ Elevation | 24-Hour | Run, Hike or Walk

Cornwall, CT

Sat, Nov 14, 2026

Roxbury Fall Classic

Roxbury, CT

OutsideMarathon31.1 mi

Thu, Jun 3, 2027

IronHike Mohawk Mountain Spring Series 2027

Mohawk Mtn Ski Area, Cornwall, CT

Outside29.0 mi100.0 mi15.0 mi28.8 mi

Sat, Jul 10, 2027

Litchfield Hills Triathlon

New Hartford, CT

Outside31.0 mi25.0 mi

Don't lose this one.

Save any Connecticut race to your calendar and we'll remind you when it matters.

Create your free account

Your whole running year, in one place.

Follow your friends, save Connecticut races, and keep every start line in one calendar.

Create your free account

Ultra races by city in Connecticut