MR340 course distance tool

This tool is a distance calculator for the MR340 race route, to enable racers, ground crews, and race staff to quickly read distances between any two points on the course.

The MR340 is the world's longest nonstop river race. This year's dates are July 28 - 31, 2026. See the MR340 website for more details about the race.

Size is about 6" in diameter. These are waterproof and they float! There's a hole for a lanyard (not included).