A:BEST FOR: Open-water swimming
WHEN TO GO: Year round
There is a reason that the triathlon was invented in San Diego. The city has an average temperature of 70.5 degrees Fahrenheit with little rainfall and endless opportunity for open-water swimming in the Pacific Ocean. Up the coast in San Diego’s North County cities it’s not uncommon to catch Ironman world champ Chris McCormack dining at California Pizza Kitchen, or triathlon icon Michellie Jones out for a ride. Cycle flat along the coast, or head inland for endless, punishing hills. Join the famous Swami’s ride on a Saturday morning, eat at the health-conscious Swami’s Cafe, then head out for a run on one of hundreds of trails. As in Boulder, you'll never want for a training partner, or a new trail to explore.