Sierra Nevada Backpacking:

Echo Col - Trailless spot to cross from Inyo National Forest to Kings Canyon National Park. (Google Earth kmz file)

Gallant's Kings Canyon Ordeal (website) - A backpacking trip that went a little awry.

SF Bay Area Hiking/Backpacking:

Bay Area Ridge Trail - This is a trail (at least in part) that eventually will encircle the entire San Francisco Bay Area.
Coe Hike of 2009 Mar 08 - Henry W. Coe State Park east of Morgan Hill and Gilroy.
Garin Park - This East Bay Regional Parks District park is located just east of Mission Blvd in Union City and south Hayward. The Google Earth file here has entrance locations and a few of the selected trails.
Las Trampas Regional Wilderness - East Bay near San Ramon, Danville, and Castro Valley
Sunol Regional Wilderness (kmz file) - This East Bay Regional Parks District park is located off of Calaveras Rd. a few miles south of the southmost Sunol exit of I680. The Google Earth file here has most of the trails and attractions of the park.