Connecticut Ultramarathons
30 upcoming ultras across Connecticut, updated nightly. Want radius search and maps? Open these in the Race Finder.
When to race: ultras in Connecticut
Connecticut has 30 upcoming ultras over the next 12 months. October is the busiest month for them, with 14. Most are around Cornwall, Stratford, Kent. The next one is The Cross-Connecticut Run for Mental Health Awareness on September 12 in West Suffield.
- Sep 20262 races
- Oct 202614 races
- Nov 20263 races
- Dec 20261 race
- Mar 20271 race
- Apr 20275 races
- May 20272 races
- Jun 20271 race
- Jul 20271 race
September 2026
- Sat 9/12The Cross-Connecticut Run for Mental Health AwarenessWest Suffield, CT · 56 Miles · register ↗
- Sun 9/13Macedonia Trail RaceKent, CT · 50K · 25K · 12K · Trail · register ↗
October 2026
- Thu 10/1Answer 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 · 61 Miles · Trail · registration closed · register ↗
- Thu 10/1Everest - 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 · 61 Miles · Trail · registration closed · register ↗
- Thu 10/1Everest - 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 · 61 Miles · Trail · registration closed
- Thu 10/1IronHike Mohawk Mountain Fall Series 2026Mohawk Mtn Ski Area, Cornwall, CT · 29 Miles · 100 Mile · 15 Miles · 28.8 Miles · 43.8 Miles · Trail · from $145 · register ↗
- Thu 10/1IronHike 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 UltraCornwall, CT · 152 Miles · Trail · from $1495 · registration closed · register ↗
- Thu 10/1IronHike 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 UltraCornwall, CT · 152 Miles · Trail · from $2452 · registration closed
- Fri 10/2Denali - 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 · 43 Miles · Trail · registration closed · register ↗
- Fri 10/2Denali - 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 · 43 Miles · Trail · registration closed
- Sat 10/3Forbidden Forest 30 Hour UltraStratford, CT · 30 Hour · Trail · registration closed · register ↗
- Sat 10/3Forbidden Forest 30 Hour Ultra Trail RunStratford, CT · 30 Hour · Trail · register ↗
- Sat 10/3Iron Hike - Fall Answer the Bell Ultra Trail Marathon - Basic (Backyard Ultra Format) - 28+ Miles | 14,400'+ Elevation | 24-Hour | Run, Hike or WalkCornwall, CT · 61 Miles · Trail · registration closed · register ↗
- Sat 10/3Iron Hike - Fall Double Kuwohi Trail Marathon Plus - 28+ Miles | 13,685' Elevation | 24-Hour | Run, Hike or WalkCornwall, CT · 28 Miles · Trail · registration closed · register ↗
- Sat 10/3Iron Hike - Fall Double Kuwohi Trail Marathon Plus Relay - 28+ Miles | 13,685' Elevation | 24-Hour | Run, Hike or WalkCornwall, CT · 28 Miles · Trail · registration closed · register ↗
- Sun 10/18Bimblers Bluff 50KGuilford, CT · 50K · register ↗
November 2026
- Sun 11/18 Hours at the FarmBrookfield, CT · 8 Hour · 4 Hour · 5K · register ↗
- Sat 11/14Great Lawn Backyard UltraNorwalk, CT · Timed · register ↗
- Sat 11/14Roxbury Fall ClassicRoxbury, CT · Half Marathon · Marathon · 50K · from $50 · register ↗
December 2026
- Sat 12/5Tower Tag ChallengeHamden, CT · 8 Hour · 4 Hour · register ↗
March 2027
- Sat 3/20Enchanted Forest Ultra RunStratford, CT · 6 Hour · Trail · register ↗
April 2027
- Sun 4/4Sleeping Giant Trail RunsHamden, CT · 50K · 25K · Trail · register ↗
- Sat 4/10CT123 (200K)East Thompson, CT · 200K · 100K · register ↗
- Sat 4/17Traprock 50Bloomfield, CT · 50K · 17K · register ↗
- Sat 4/24Lake Mohegan Trail RaceFairfield, CT · 10K · 5K · 4 Hour · Trail · register ↗
- Sun 4/25Jack Bristol Lake Waramaug Ultra RacesKent, CT · 100K · 50 Mile · 50K · register ↗
May 2027
- Sat 5/15Forgotten Forest Ultra RunStratford, CT · 9 Hour · Trail · register ↗
- Sat 5/22Run Ragged Last Person StandingBerlin, CT · Timed · register ↗
June 2027
- Thu 6/24Centurion Ultra Trail EventStratford, CT · 72 Hour · Trail · register ↗
July 2027
- Sat 7/10Litchfield Hills TriathlonNew Hartford, CT · 50K · 25 Miles · from $99 · register ↗
Planning a race
- The adventure listrim to rim, the big rounds, and routes worth planning a year around
- Getting inhow entry works for the races that sell out or ballot
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