Trail Running Calendar Connecticut 2025-2026

Join the Frosty Forest 5K in Stratford CT on December 13 for a festive off road run through Roosevelt Forest. Run, jog, hike or walk in holiday costumes, enjoy winter trails, and support local causes.

Join the 8th Annual Taco Trials in Rocky Hill CT: eat a taco then run a one mile loop, repeat ten times for fun and trophies. All proceeds benefit the Connecticut Forest and Park Association and the event is full with a waitlist.

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.

Take on the Sleeping Giant Trail Runs at Sleeping Giant State Park in Hamden CT. Choose 25K or 50K two loop options over rugged, rocky singletrack with 3,000 feet of climbing; aid stations are cupless so bring your own bottle.

Run Across CT 123 is a point to point ultramarathon across about 123 miles of Connecticut, weaving trails and backroads through 25 towns. Choose 100K or 200K solo or relay and chase a coveted belt buckle for 200K finishers.

Run a scenic 6.55 mile quarter marathon through West Hartford Reservoir 4 as two loops around the park. Limited to 150 runners, the event features chip timing, post race treats and awards in five year age groups.

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.

Celebrate women and non binary runners at the Lake Mohegan Women’s Trail Race on April 25, 2026 with scenic trails around the lake. Pick a 5K, 10K or a 4 hour loop to challenge yourself and earn a finisher medal.

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.

Tackle the Mine Hill Half Marathon, a scenic road race that climbs hard in the first half then rewards you with a fast mostly downhill return to Mine Hill Distillery in Roxbury. Finishers get a medal and a lively post race celebration.

IronHike Series Spring 26 takes place June 4 to 7 at Mohawk Mountain, CT, with solo and team endurance options from 15 to 152 miles. This non competitive FlexRelay invites crews to self manage pacing, rest and night trekking.

Join Norbrook Farm Brewery Trail Festival on June 13, 2026 in Colebrook CT for a day of trail runs and mountain bike races on scenic farm trails. Multiple distances, awards and a free beer for those 21 plus create a festive finish.

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..

The Soapstone Assault is a rugged 5.5 mile trail race in Somers, CT with six climbs and about 1,500 feet of ascent. Limited to 50 runners, it is a tough course for experienced runners and includes a pre race safety briefing and breakfast.

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.

The Shenipsit Striders Fatass will take place in Tolland on Saturday 15 August 2026. You can run 5 kilometers.