Last night, we drove up the road a few miles to check out a couple of abutting nearby parks: Garin/Dry Creek Pioneer Regional Parks in Union City. I was quite amazed! If you are looking for a great Bay Area place to hike, see great views, and be almost by yourself (we were on the trail with only one other hiker)...this is the place to do it! The park is open from 5am-9pm.
We started at 7:10pm and finished up around 8:55pm. Our route was the High Ridge Loop Trail ~ 5 miles. They charge $5 to park there, but only when the kiosk is manned (it wasn't when we dropped by). There were "signs" of cows, but we didn't see any.
This will be a great place to spend some time in the early morning getting ready for Half Dome in mid-August. I think Cassi (our dog) will like to join us there as well.