Trail Running Calendar Connecticut 2026-2027

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.

Tackle roughly 16 miles on the scenic, technical Nipmuck Trail in Union, Connecticut, running an out and back through Yale Myers Forest to Boston Hollow. Field capped at 100 with limited aid and no race day registration; proceeds support lo..

Run Sleeping Giant State Park on scenic, challenging trails with 25K and 50K options. Tackle runnable miles, rocky singletrack and a steep scramble to sweeping views, while supporting the park through registration proceeds.

CT123 is a point to point 123 mile ultramarathon across Connecticut, blending trails and backroads for a scenic, challenging adventure. Choose solo 200K or 100K or team relay options, and earn a buckle or medal plus a 2025 race tee.

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.

Run a scenic all terrain 5K through Stamford Museum and Nature Center, looping Bendel Pond and passing farm animals. Bring kids for a fun run with Petunia the Scottish Highland cow and support the museum.

Take on the Traprock 50 at Penwood State Park in Bloomfield, CT on April 18, 2026. Choose a rugged 50K of three rolling, rocky loops or a single 17K loop along technical single track and scenic forest roads. Bring your own cup.

Women focused trail run at Lake Mohegan offering a runnable 5K loop, a 10K two lap option and a 4 hour loop challenge. Expect scenic trails, medals for finishers and post race snacks; nonbinary runners are welcome.

Celebrate the 52nd Jack Bristol Lake Waramaug Ultra on April 26 in Kent Connecticut with 100K, 50 Miler, and 50K options on scenic rolling loops around the lake. Fast paved roads, four aid stations, and a friendly finish at Lake Waramaug St..

Blue 2 Blue Challenge is a tough 50K on New Haven's blue blazed trails, featuring rocky technical terrain and big climbs linking West Rock and Quinnipiac. Entry is by vetted waitlist and the race enforces strict cutoffs so come prepared.

Take on scenic singletrack at the Mount Archer Trail Race in Lyme CT on May 3, 2026 with a tough 9.2 mile loop or a fun 3 mile sprint. Chip timed results, post race food and drinks, and proceeds support the Lyme Fire Department and Lyme Amb..

Explore Soapstone Mountain trails in Stafford Springs with a new half marathon that climbs past the fire tower or a fun 6K sampler open to walkers. Proceeds benefit Connecticut trail stewardship. The event is cupless so bring your own water..

Run the Mine Hill Half Marathon from Mine Hill Distillery, a scenic course of rolling climbs, gravel and paved roads, with a downhill second half beside the Shepaug River. Celebrate postrace with food, drinks and distillery samples.

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.

Join the Run in the Park 5K at Eisenhower Park in Milford on June 7 to support the Milford Rotary and the Beth El Center. Enjoy a scenic, mostly flat trail loop welcoming runners, walkers, hikers, families, dogs, and teams.

Trail action at Mansfield Hollow State Park with a scenic yet challenging 15 Miler along the Nipmuck Trail and a new technical 5K inside the park. Expect river views, woods, bridges and climbs while supporting Connecticut trail stewardship..

Tackle Soapstone Assault, a rugged 5.5 mile trail race up Soapstone Mountain in Somers CT on July 26, 2026, featuring six steep climbs and about 1,500 feet of climbing. Expect rocky, technical terrain and stunning summit views.

Run the Stonington Cross Country 5K in Pawcatuck at Stonington High School on Wednesday August 5. The scenic course starts and finishes on the track and winds through quiet streets, trails and grassy crossings for a community run.

Run loops on a roughly 5K trail course during an eight hour celebration with the Shenipsit Striders in Tolland. Bring food, enjoy the grill, earn raffle tickets and a 50th anniversary gift while supporting local trail stewardship.

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.