Connecticut
Connecticut Triathlon Calendar 2026-2027
Monthly updates for Connecticut
Get new running races (and updates) in your inbox every month.
Explore the best triathlons in Connecticut for 2026-2027! Our updated list features 19 exciting races across the region. Find your next race in Connecticut below and join the running community at these great events!
June 2026
Lake Terramuggus Sprint Triathlon in Marlborough CT features lake swims, rolling bike loops and a 5K lakeside run. Multiple distances are offered including a Super Sprint, relay division and an aqua bike option.
A USAT sanctioned multi-format race day at Quassy Amusement Park featuring Olympic and Sprint triathlons, duathlon, aquabike, and relays, with lake swims, looped bike courses, and a First Timers division with medals.
A midweek summer triathlon at Cedar Lake in Chester CT offering sprint and super sprint formats for individuals and relay teams. Short lake swims, bike and run courses with family-friendly entry rules and preregistration required.
July 2026
A multi-distance triathlon at Blish Park in Marlborough CT on July 2, 2026 offering sprint, super sprint, relay and aqua bike options. Courses include lake swims, rolling bike loops and a lakeside run with aid at the town hall section.
An evening triathlon at Cedar Lake offering sprint and super sprint formats with individual and relay entries, family-friendly options, and specific swim-bike-run courses. Preregistration is required and safety rules apply.
An Olympic-distance triathlon at West Hill Lake in New Hartford, CT, featuring a 1500 m swim, 40 km bike and 10 km run; AquaBike and relay options are offered, paratriathletes are welcome and there are no cut-off times.
A sprint triathlon at Hopkins Vineyard in New Preston, Connecticut on July 11, 2026, featuring swim and bike segments around Lake Waramaug. Entry categories include individual USAT member and non member options and a relay team category.
Lake Terramuggus at Blish Park on July 16, 2026 offers Sprint, Super Sprint, relay, and aqua bike options, with swims, looped bike courses, and a 5K run around the lake.
A mid-summer Cedar Lake triathlon in Chester, CT offering sprint and super sprint formats with individual and relay entries. Preregistration is required and specific safety, equipment, and age rules apply.
A midsummer triathlon at Blish Park with Sprint, Super Sprint, relay and Aqua Bike options. The event features lake swims, looped bike courses and a 5K run around the lake.
August 2026
A youth triathlon finale in Southington Connecticut for Race4Chase program participants after six weeks of training, with free registration for eligible members and a complimentary USA Triathlon Youth annual membership for all participants.
Final race of a six week series at Cedar Lake offering sprint and super sprint triathlons, individual and relay entries, family-friendly options, and required preregistration.
A sprint triathlon at Sharon Town Beach on August 8, 2026 with a half mile swim, a 12.1 mile bike and a 4.1 mile run. Individual and team entry options are offered and awards are given for overall, age groups and teams.
A community triathlon at East Haddam Town Beach with a sprint race and a family fun tri featuring a 100 m swim, 5 km bike and 1 mile run. Live music and food trucks support the CMY Scholarship Fund.
A sprint triathlon around Niantic Bay and East Lyme featuring a calm 1/2 mile swim, an 11.4 mile bike loop, and a 3.2 mile oceanfront run with a beach finish. Team relay and aquabike options are available.
Olympic distance triathlon at Lake Terramuggus in Marlborough, CT on August 15, 2026 featuring individual, relay, and aquabike options, age-group awards, and specific bike course and safety rules.
September 2026
A USAT sanctioned sprint triathlon at Madison Town Beach featuring a half-mile swim, 13-mile bike and 3-mile run, plus aquabike, youth, relay and parathlete divisions. Field limited to 500 and USAT membership is required.
May 2027
BoFish Triathlon at Pinewood Lake in Trumbull, CT features a 1 mile swim, a 25 mile out and back bike, and a 5 mile run with hilly terrain. Proceeds support the Cardinal Sheehan Center.