Trail Running Calendar Connecticut 2025-2026

The Northern Nipmuck Trail Race is a 16-mile trail running event held in Union, Connecticut, organized by the Shenipsit Striders. Revived in 2022 after a hiatus, the race maintains a friendly, low-key atmosphere, attracting runners of all levels. The course traverses the Nipmuck Trail, featuring tec..

The Enchanted Forest Ultra Run is a captivating 6-hour ultra event taking place in Roosevelt Forest, Stratford, CT. Participants can run or hike a 2.3-mile loop trail, aiming for as many miles as possible within the time limit or striving for the 50K milestone. This event is suitable for both novice..

The Sleeping Giant Trail Runs, set in the iconic Sleeping Giant State Park in Hamden, CT, promises to be one of the toughest trail races in the Northeast. Participants can choose between a challenging 25K or a grueling 50K course, featuring over 30 miles of diverse terrain, including smooth carriage..

The Farm & Forest All-Terrain 5K & Kid Fun Run is an exciting outdoor running event scheduled for April 6, 2025, in Stamford, Connecticut. Participants will enjoy a scenic 5K course that begins at the Fedele Family Plaza and winds through Heckscher Farm, featuring various animals and beautiful lands..

The Traprock 50 is a challenging trail running event held at Penwood State Park in Bloomfield, CT, featuring two race distances: a 50K and a 17K. The course consists of approximately 10.5-11 miles per loop, with the 50K requiring three loops and the 17K one loop. Runners will navigate a mix of techn..

The Lake Mohegan Trail Race is a women's only trail running event held in Fairfield, CT, organized by Steep Endurance. Aimed at promoting trail running among women, the event typically sees 30-40% female participation, with over 125 runners in 2024. The race features three distance options: a 5K, a..

The Jack Bristol Lake Waramaug Ultra Races, taking place on April 27, 2025, is a celebrated ultra-running event in Connecticut, marking its 51st anniversary. This historic race features three distances: 100K, 50 miles, and 50K, all set around the scenic Lake Waramaug. Participants can expect well-st..

The Forgotten Forest Ultra Run is a unique trail running event held in Roosevelt Forest, Stratford, CT. Scheduled for May 3, 2025, this 9-hour ultra trail race invites participants of all levels, including runners, joggers, hikers, and walkers, to complete as many miles as they can on a well-marked..

The Blue 2 Blue Challenge is a demanding 50K trail race set in New Haven, Connecticut, known for its challenging terrain and technical trails. Participants will navigate some of the toughest trails in the state, including the Regicides and Quinnipiac Trails, with a total elevation gain of approximat..

The Ansonia Trails 5K is a running event taking place in Ansonia, CT, designed for participants of the 169 Society. This second annual race features a unique course consisting of two laps around a 1.55-mile loop, making it slightly over or under a traditional 5K distance. Limited to 50 runners, the..

The Run Ragged Last Person Standing event, hosted by the CT Trailmixers, is an exciting endurance race set in the rugged terrain of Ragged Mountain, Berlin, CT. Participants will tackle a challenging 3.11-mile loop, with one hour to complete each lap. The race continues until only one runner remains..

The Soapstone Mountain Trail Races, taking place on May 18, 2025, in Stafford Springs, CT, features two scenic races: a 25K and a 6K "Sampler." Both courses wind through the picturesque Soapstone Mountain area and Shenipsit Forest State Park. The event emphasizes community and environmental stewards..

The Mine Hill Half Marathon, hosted by Steep Endurance, is touted as one of the toughest road half marathons in Connecticut. Set against the stunning backdrop of Roxbury, participants will enjoy breathtaking views of farms and fields while navigating a challenging course that features both uphill cl..

The IronHike Endurance Series - Spring 2025 takes place at Mohawk Mountain in Cornwall, CT, from June 5 to June 8, 2025. This unique event combines hiking and trail running, offering participants various challenges, including individual and team formats. Events range from 12 to 84 hours, with distan..

The Norbrook Farm Brewery Trail Festival is an exciting outdoor event featuring a variety of trails for both runners and mountain bikers. Participants can enjoy a full day of activities, including a 4-hour run, 10K and 5K runs, a run/bike duathlon, and various mountain bike races. The festival also..

The Ansonia Six Hour Trail Run is an exciting endurance event taking place at the Ansonia Nature Center in Ansonia, Connecticut. Participants will tackle approximately 1.9-mile loops on moderately technical singletrack trails, featuring about 170 feet of elevation gain per loop. Scheduled for the se..

The Nipmuck South Trail Race is a scenic 15.7-mile out-and-back race held in Mansfield, Connecticut, primarily along the beautiful Fenton River. Participants will encounter diverse terrain, including small bridge crossings and a climb to a 50-foot cliff. The event features three water stops and supp..

The Summer Solstice Trail Run is an exciting early morning event held in Gay City State Park, featuring three race distances: 3 miles, 5 miles, and 8 miles. The 8-mile race is part of the 2025 Blue-Blazed Trail Running Series and the USATF-CT Mountain, Ultra and Trail series, offering teams a chance..

The Brooksvale 12-Hour event is a unique running challenge set in Hamden, CT, featuring a 4.25-mile loop with a total elevation gain of 500 feet. Participants can aim for various distances, including 50 miles, a marathon, or a 50k, making it suitable for runners of all levels. The event includes aid..

The Centurion Ultra Trail Event, part of the Roosevelt Forest Ultras series, is set to take place in Stratford, Connecticut, featuring a challenging 100-mile race with a loop course of 2.5 miles. Participants can earn one of three unique buckles based on their completion times: Red for under 24 hour..