The Bayshore Trail in downtown San Diego is one of my favorite places to run in America. Like Central Park in New York, Chicago’s Lakefront, or the Embarcadero in San Francisco, it’s where runners find rare long stretches to run, uninterrupted by auto or foot traffic as the would find in most parts of the city. Like most popular running trails, it’s character changes over the course of the day. In the morning, it’s full of runners and a few bikers getting in their morning workouts. As the morning evolves into the day vacationers and sightseers start taking over.