– Registration Opening Soon. Come join us and experience one of the Southwest’s best venues. This local, family-run event is the 5th oldest triathlon West of the Mississippi River. The race course includes breathtaking views of the San Francisco Peaks, Lake Mary, and Mormon Lake. Right after the monsoon season with flora in full bloom. This is our 34th annual event with medals for all finishers, great awards, food, fun, and a great course. The Upper Lake Mary boat docks are about ten miles south of Flagstaff, AZ on Lake Mary Road at mile post 333. Click Here for Directions from downtown Flagstaff. RFID Race Timing Systems by 4Peaks Racing. This event goes on, rain or shine.

Past Race Results

Olympic Race Distances: 1500 m Swim, 40 km Bike, and 10 km Run

Long Course Race Distances: 1900 m Swim, 90 km Bike, and 21 km Run

2019 Start Time: First Swim Wave: 6:10 AM, Transition area closes at 5:55 AM


The Arizona Tri Series is composed of 4 events: