1. Sabates Eye Centers Trolley Run

The Buzz -- This mostly downhill four-mile run speeds through Brookside to Country Club Plaza every year to benefit the Children's Center for the Visually Impaired. The famously fast course, which claims both male and female four-mile American record times, attracts athletes seeking serious competition as well as folks who just want to support a good cause. A separate kids' fun run is held after the adults' race, and the post-race party at the plaza is the most fun of all.