I went for a hike in San Ramon to visit
Las Trampas Park. My pictures are
on flickr. The park was pretty huge and my 1.5 mile hike only scratched the surface of the park. The sky was really grey and I wasn't very happy with the photos overall.
When I hike, I try and track the path on
EveryTrail which uses an iPhone app to follow my location over GPS and then overlay it on a map. I know a lot of services exist to do this, but so far I really like this site.
While driving to Las Trampas, I passed 3 or 4 really amazing barns that screamed for photos, but once again, no safe place to stop and shoot a pic along the drive.