In a city of precipitous hills, never-ending stairways, and limited parking spaces, it's hard to stay sedentary any time of year — even if most of your movements are restricted to a convenient 2-mile radius, like most vehicularly challenged urbanites. Unlike metropolitan areas that offer little to no opportunities to get beyond the gravel and bond with nature, San Francisco boasts a plethora of activities that encompasses not just the rigorous sport of people-watching from the comfort of your sidewalk cafe, but also close-to-the-earth escapades that'll get you to embrace your inner jock, daredevil,... More >>>