San Francisco Bay Trail - encircling the Bay with walking, running, biking and touring trails. Transit Outdoors - As a transit user, you can go places the automobile dependent cannot, because you don't need to return to the same trailhead you started at. Here's some examples of great one-way trails. Golden Gate Park - directions, points of interest and map. Angel Island State Park - only accessible by ferry.
Site includes checklist of activities.
Portola - A guide to trails on the San Francisco Peninsula. The California State Parks Foundation - California State Parks information. California's State Parks - more Information on California's State Parks. Moosehead Lake Region of Maine - suggested trails, directions and estimated time and difficulty of various hiking trails. Available are complete topographic maps, photos and brief descriptions of the trail.