Trail Running calendar near Mansfield 2025-2026

Seth’s Fat Ass 50K at Forest Park in Springfield on December 20 invites runners to tackle between one 5K loop and the full ten loop 50K in a festive, low key winter setting. Enjoy scenic roads and trails, event swag and a seven hour limit.

Join a friendly, informal 5 to 10k run or snowshoe on a roughly 10k course with loaner snowshoes available. Bring a spare pair to share, enjoy light refreshments, and team up for bragging rights and a shared baked treat.

Tackle the TARCtic Frozen Yeti at Hale Education in Westwood MA on Feb 7 and 8 2026 with a 30 hour challenge or a 15 mile looped race. Expect well marked winter trails, regular aid and proceeds supporting land conservation.

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.

Join Ramsey's Run in Kingston MA on March 14, 2026 for a scenic 5k trail run through the woods, timed by a professional company. Honor a class of 2023 member and support a family scholarship with every entry.

Run or walk a scenic two loop 5K through Osprey's Dominion vineyards, then toast with wine themed swag including a soft tee, collapsible wine glass and a finisher medal that doubles as a wine stopper. Family friendly and chip timed.

Run scenic singletrack loops around ponds and woodlands at Hale Education in Westwood, with a 6 hour endurance option or a 3.5 mile loop. Bring your own bottle for this cupless event and enjoy a laid back aid station at the start.

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.

Hit the trails at Wompatuck State Park in Hingham MA with 5K, 5 mile and 8 hour lap options for all abilities. Expect muddy April trails, on course aid and a community feed, with registration closing April 10 and a 50 runner cap for the 8 h..

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.

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.

Run the TARC Spring Classic at Jericho Town Forest on April 26, 2025, choosing distances from 10K to 50K plus a free youth fun run. Enjoy a smooth, relatively flat looped trail with one aid station offering vegan friendly options.

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.

Tackle the scenic Seven Sisters Trail Race in Amherst, MA on May 2, 2026, an out and back along the Holyoke Range ridgecrest. This rugged 12 mile course delivers steep climbs, rocky singletrack and over 3,500 ft of elevation for a thrilling..

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.

Take on the Dandelion Dash 5K or the Mushroom Mile on The Hartsbrook School trails, with a virtual option available. Muddy, scenic terrain and proceeds support the school's Land Stewardship program.

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.