This event has passed. Aquaman Duathlon August 14, 2021 Run, swim, run aquathlon. Fourth event of the 3 Rivers Multi-Sport Series. Individuals only. 2 mile run, half mile swim, 3 mile run. : Triathlon / Duathlon Register Location Richland, Washington Richland, WA 99352 United States Organizer 3 Rivers Road Runners Email sageg@charter.net View Organizer Website