Trail Running Calendar Connecticut 2025-2026

Join the Frozen Heart 900, a free grassroots winter loop in Rockfall CT where runners take on a 15 hour challenge around a 2.2 mile trail loop. Self supported format with a heated meeting room for warming, so bring headlamps and carpool.

Test your trail skills on the Northern Nipmuck Trail Race, a rugged 16 mile out and back through Yale Myers Forest and Boston Hollow with technical terrain and serious climbing. Limited to 100 entrants, proceeds support local trails.

Tackle rugged singletrack and steep rock scrambles at the Sleeping Giant Trail Runs in Hamden CT on March 29, 2026. Choose a challenging 25K loop or a double 50K and enjoy aid stations, medals and post race food and drinks.

Join CT123 on April 4, 2026, a point to point 123 mile ultramarathon across Connecticut that blends trails and backroads for a challenging spring adventure. Solo and relay entries welcome and 200K finishers earn a commemorative belt buckle.

Run a scenic quarter marathon at West Hartford Reservoir on April 11, 2026, as the Hartford Track Club hosts a small, timed field limited to 150 runners. Enjoy chip timing, post race treats and a friendly, looped trail course.

Tackle wooded trails at the Farm & Forest All Terrain 5K and Hog Wild Kids Fun Run in Stamford, CT on April 12, 2026. Family friendly and community focused, this race raises funds for the Stamford Museum and Nature Center.

Take on rugged Traprock at Penwood State Park in Bloomfield CT on April 18, 2026 with 17K one loop or 50K three loop options. Expect rolling, technical single track and rocky trails; bring your own cup for this cupless, chip timed race.

Join the Lake Mohegan Women’s Trail Race at Lake Mohegan in Fairfield CT for 5K, 10K or a 4 hour loop challenge open to women and non binary runners. Enjoy scenic trails, finisher medals, post race snacks and a welcoming community vibe.

Run the 52nd Jack Bristol Lake Waramaug Ultra Races on April 26, 2026 in Kent CT with 100K, 50 mile and 50K options around scenic Lake Waramaug. Flat rolling loops, four aid stations and finisher swag make this a rewarding spring ultra.

Blue 2 Blue Challenge is a rugged 50K through New Haven trails, with about 6350 ft of climbing and technical rocky terrain including a summit at Mt Sanford. Expect a cutoff driven, no frills race for seasoned trail runners.

Run the Mount Archer Trail Race Sunday May 3 2026 in Lyme CT with a scenic 9.2 mile loop or a 3 mile option for runners and walkers. Chip timing, aid stations, and proceeds support Lyme emergency services.

Explore trails around Soapstone Mountain and Shenipsit Forest at the Soapstone Mountain Trail Races in Stafford Springs, CT on May 17, 2026. Pick a half marathon or 6K, support local trail stewardship, and register January 1, 2026.

Run the Mine Hill half marathon on 24 May 2026 in Roxbury Connecticut, starting and finishing at Mine Hill Distillery. Enjoy rolling country roads with sweeping farm views, then celebrate at the distillery after party.

IronHike Spring 26 at Mohawk Mountain CT in June offers endurance routes from 15 to 152 miles for solo runners, teams and families in a flexible relay format. Enjoy basecamp camping, support stations and finisher gear.

Run the scenic 15.7 mile Nipmuck South Trail at Mansfield Hollow State Park, following the Nipmuck Trail along the Fenton River through woods, fields and a climb to a cliff. Proceeds benefit Connecticut trail stewardship groups and the Blue..

Soapstone Assault is a rugged 5.5 mile trail race with six steep climbs and about 1500 feet of climbing. Field limited to 50 runners and parking is tight, making this an intimate but fierce challenge with post race breakfast sandwiches.

Experience the Stonington Cross Country 5K at Stonington High School, a scenic route from the track through campus streets and wooded trails to a field finish. Family friendly with a kids half mile for ages 10 and under.

Join an 8 hour trail gathering at Crandall's Park and run as many 5K loops as you like. Potluck, raffles, prizes and a Shenipsit Striders 50th anniversary gift for those who complete at least one loop.

Run for The Hills is a 4th annual trail 5K on September 12, 2026 at Oswegatchie Hills Nature Preserve, winding around Clark Pond. Expect exposed rocks and roots on scenic trails while helping support preserve maintenance.

Macedonia Trail Race at Macedonia Brook State Park offers scenic single track and forest trails with climbs and viewpoints. Choose 50K, 25K or 12K for a rewarding day of trail running in Connecticut.