This 7.3-mile trail is the perfect place for runners to get a complete workout. Within walking distance from the UC Berkeley campus, the fire trail offers dirt terrain, steep hills, and picturesque views of UC Berkeley's Campanile, the Golden Gate Bridge, and Mount Tamalpais. Just as importantly, you don't have to share the narrow pathway with cyclists, since the trail is reserved for running and hiking. If you really want to feel the burn, run the first hill along the trail. Most people walk it.