370 Lakeside Triathlon
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370 Lakeside Triathlon : overview
The 370 Lakeside Triathlon takes place on August 23, 2026, at 370 Lakeside Park, 1000 Lakeside Park Drive, Saint Peters, MO 63376. The event is USAT sanctioned and is the sixth edition. The course begins with a beach start and includes country roads in St. Charles County and park trails on the run. An open water swim clinic is scheduled at 370 Lakeside Park the day before the main event.
Race options and logistics
The event offers a wide range of options including super sprint, sprint, Olympic and half-distance triathlons, duathlons, aquabike, aquathlon, relay divisions, para events, collegiate and high school divisions, and a 5K run. Some events have specific age limits, for example the sprint collegiate division is open to ages 16-24 and the sprint high school division to ages 14-19; many other events are open to ages 14 and up. A multi-event bundle with a small per-event discount is offered. All athletes must show a photo ID and pick up their own race packet; no exceptions are allowed. Visit the organization's website for the most recent information.
