The San Francisco Bay National Wildlife Refuge , along with a number of local and regional parks, ring the southern end of San Francisco Bay. Numerous paved and dirt trails follow the shoreline, and some reach far out into the bay on levees originally built to contain salt evaporation ponds. The Dumbarton Bridge bike path connects the east and west sides. For a great view of the South Bay, climb to the top of Mission Peak .
Trails ascend from both the north and south sides of the peak.
At Sunol Regional Wilderness secluded hills and rock outcroppings entice riders. In Spring the hills are host to beautiful wildflower displays. A small walk-in campground is available. In the foothills of Mount Hamilton, Joseph Grant County Park offers over 25 miles of roads over rolling hills. The highest trails overlook a deep canyon on the back side of the park.