Once upon a time, I helped friends train for the Camino de Santiago—a pilgrimage walk in Spain–covering 500 miles/804 km. To prepare, they would plan out local Urban Hikes of at least 10 miles. In Los Angeles, this involves a lot of planning. Many of the highways cut swaths into the city, cutting off neighborhoods from each other. So many of the freeway entrances, although they involve crosswalks, are completely…