After going up the loop, we found some questionable parking across from a trailhead.
We really enjoyed this hike up to the views of the valley. We weren't sure where the side trail started and we kept cutting over at the wrong place. Finally we reached the top and headed down a bit. There were some interesting tracks in the mud which I think may have been from a mountain lion.
The cache was at a great spot. We found it easily, took a golf ball, and left a smiley guy.
These Portola Valley caches really should get some more visitors - they're quite nice.