Fox Lake Sprint Triathlon
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Event overview
The Fox Lake Sprint Triathlon is a USAT-sanctioned sprint triathlon held in Fox Lake, Illinois. The event in 2026 is the ninth edition and takes place at LakeFront Park. Registration closes on June 5, 2026. The race uses a time-trial start format with starts every five seconds. Individual entries and relay teams are accepted.
Race format and course
- 750 yards swim on a triangular course in Nippersink Lake with two inflatable "duck" turns and a marked finish.
- 12 miles bike on a rolling course with some continuous straight sections; no-draft rules apply and a USAT official will monitor the bike course.
- 3.1 miles run on an out-and-back mostly on an asphalt bike path, with over two miles on the paved path.
Parking is available within two blocks of the transition area, and the finish line is located steps from transition. The event is described as typically wetsuit-legal.
Logistics, fees and policies
Packet pick-up is available before race weekend at a local running store and at the race site on the weekend. The event offers individual and relay pricing; relay teams may consist of two or three racers (for example, one swimmer, one biker, one runner). A full refund (less processing fee) is available only if requested before May 19, 2026; transfers must be completed by June 1, 2026. The race includes post-race food, music, and awards given near the finish area.
Series option
A Lake County Triathlon Series groups three sprint races (Fox Lake, Lake Zurich, Wauconda) under one entry. The series is limited to 50 participants, uses cumulative time to determine overall winners, and has a non-refundable entry fee. Visit the organization's website for the most recent information.
