Tri-Maine presents the Sebago Lake Triathlon on Sunday, June 27, 2027, at Saint Joseph’s College, 278 Whites Bridge Road, Standish. The course combines swimming in Sebago Lake, cycling on surrounding country roads and running on the college campus.

Olympic Triathlon, Olympic Aquabike and Olympic Relay start at 7:00 AM. Sprint Triathlon, Sprint Duathlon and Sprint Relay start at 7:30 AM. An end time has not been confirmed.

Registration opens November 11, 2026, at 12:01 AM Eastern for the in-person races, closes that night at 11:59 PM, and reopens November 26 at midnight. Initial standard race fees are $104 for Sprint Triathlon or Sprint Duathlon and $129 for Olympic Triathlon or Olympic Aquabike. Relay pricing differs. Processing fees and any required USA Triathlon membership are additional; prices increase in later registration tiers, and youth discounts may apply.

See the official registration page for current prices, eligibility, availability and schedules. Details are subject to change.