Ready to Try? I did a few spring triathlon's a years ago in the San Francisco area. My favorites were Tri for Fun , and the Tiburon Triathlon which you could relay as well. Also, Self Magazine has a list of Sprint Triathlon's around the US this summer and fall. These women-only, sprint-distance races—1/2 mile swim, 12-mile bike ride, 3.1 mile run—are a great place to start getting fit and have fun.