Missouri American Water MR340

The MR340 is a true community event - a community created by the river. To witness the determination of the racers, the grit of the ground crews and the hospitality of the volunteers is a truly inspiring thing. The race is hosted by Missouri River Relief, a nonprofit dedicated to connecting people to the Missouri River through stewardship, education and recreation. We are so proud to be carrying the tradition of this world-class race.

The race goes 24-hours a day, with racers stopping at boat ramps along the way to resupply or rest, often with “Ground Crews” of family or friends that follow along the race. There are 5 checkpoints where racers must meet the cutoff time or be disqualified from the race.

• Primary date is July 28 - July 31, 2026 (mandatory Race Check-in July 27, 2026)

• Secondary date is August 25 – August 28, 2026 (mandatory Race Check-in August 24)

This race is packed with requirements, and you must go to The Race - The MR340 to get the full scope and scale of the requirements as well as complete the registration.