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370 Lakeside Triathlon

📅 August 22, 2027 (estimated date)📍 Saint Peters · United States

⚠️ 2027 edition: provisional information

The date is estimated from the 2026 edition (August 23, 2026), on the same day of the week. Courses, start times, fees and description are carried over from the previous edition: check them on the official website. This page will be updated as soon as the organizer publishes them.

Available distances

1.2 mi + 56 mi + 13.1 mi1.5 km + 40 km + 10 km750 m + 23 km + 5 km300 m + 23 km + 2 mi

About

The 370 Lakeside Triathlon is a USAT-sanctioned event at 370 Lakeside Park in Saint Peters on August 22, 2027. Athletes start on the beach before heading out on scenic country roads and park trails. Triathlon formats cater to all levels: half (1.2-mile swim, 56-mile bike, 13.1-mile run), Olympic (1.5 km swim, 24.9-mile / 40 km bike, 10K run), sprint (750 m swim, 14.3-mile / 23 km bike, 5K run) and super sprint (300 m swim, 14.3-mile / 23 km bike, 2-mile run).

Duathlon, aquabike and aquathlon options are also available in half, Olympic and sprint versions, along with a standalone 5K run. The super sprint starts at 6:45 a.m., the triathlons, aquabikes and aquathlons at 7:00 a.m., and the duathlons and 5K at 7:30 a.m. The event strikes a balance between challenge and scenery for a memorable endurance experience.

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