St. Louis Triathlon

Lace up for an unforgettable experience at the St. Louis Triathlon, returning on Sunday, June 28, 2026, to the scenic Creve Coeur Park in Maryland Heights, MO. Renowned as one of the fastest and most electrifying triathlons in the Midwest, this USAT-sanctioned event promises an exceptional atmosphere for athletes of all levels, including a popular 5K run. Participants can anticipate typical late June conditions, with average highs around 89F and lows near 68F, and a 17% chance of precipitation, setting the stage for a warm yet potentially invigorating race day.

The 5K run course is celebrated for being flat and fast, following a paved path that winds around the picturesque Creve Coeur Lake. This out-and-back route offers abundant shade and scenic views, making for an enjoyable run. While the path is shared with other park users, runners consistently commend the course for its beauty and efficiency. Aid stations are strategically placed along the run course, typically every mile, providing essential water and electrolyte drinks to keep participants hydrated and fueled.

Beyond the course, the St. Louis Triathlon stands out for its meticulous organization and vibrant event experience. From efficient packet pickup to the energetic finish line, athletes consistently praise the well-managed logistics and supportive staff. The finish area buzzes with great energy and offers ample post-race nutrition, culminating in an epic finisher medal to celebrate your accomplishment. Whether you're a seasoned runner or looking to tackle your first 5K, the St. Louis Triathlon offers a rewarding and highly recommended race experience.