Carlyle Lake Triathlon

Carlyle Lake Triathlon

The Carlyle Lake Triathlon takes place on Sunday, September 20, 2026, at Dam West Beach, 801 Lake Road, Carlyle Township, IL. The event is USAT sanctioned. A portion of race entry proceeds will benefit NAMI. Registration includes a race t-shirt, swim cap, finisher medal, live race results, awards, and a post-race festival with food, drinks, and music.

Race options and course

Events and distances include:

• Sprint Triathlon - 750 m swim / 20 km bike / 5 km run
• Olympic Triathlon - 1.5 km swim / 40 km bike / 10 km run
• Sprint Duathlon - 3 km run / 20 km bike / 5 km run
• Olympic Duathlon - 5 km run / 40 km bike / 10 km run
• Sprint Aquabike - 750 m swim / 20 km bike
• Olympic Aquabike - 1.5 km swim / 40 km bike
• Sprint High School Triathlon and relay options

The swim starts from the beach. The bike course is described as flat and scenic across the Illinois plains. The run follows rolling country roads and finishes over the spillway with a view of the lake.

Logistics and rules

Pre-race packet pickup is scheduled the day before at Dam West Beach. All athletes must show photo ID and pick up their own packet. Packets include a wristband for transition access, a timing chip (to be worn on the left ankle), bike and helmet stickers, and a race bib to be worn on the run.

Wetsuit rules: legal if water is 78°F or below; optional at 78–83.9°F (those athletes are ineligible for awards or USAT points); not allowed at 83.9°F or above.

Cutoff times:

• Sprint overall limit 3 hours; swim under 30 minutes, bike under 2 hours, run under 3 hours.
• Olympic overall limit 4.5 hours; swim under 1 hour, bike under 3 hours 15 minutes, run under 4 hours 30 minutes.

All athletes must be a USAT annual member or purchase a one-day USAT pass. Awards are given by overall and age-group placements; age is determined as of 12/31/2026 with standard five-year age groups. Visit the organization's website for the most recent information.

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