18th Annual Missouri American Water MR340

The primary dates for the MR340 will be August 1-4, 2023.

Registration Opens on January 1, 2023 at 8:00 am

There will be a delay between your registration submission and your name then appearing on the Roster page. But please do check out the Roster page a day or two after your submission to make sure you see yourself listed. Email any questions to

Each racer registers individually. If you are racing as a tandem or team, each person must register individually but make sure you each enter the same team name and four-digit boat number so we can match your registrations together.

See our list of Frequently Asked Questions prior to registering for the race.

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