Wander through 1,600 acres of rolling grasslands where wildflowers carpet the hills each spring and dairy cows roam freely. Trails range from gentle family strolls to a 1,558-foot summit with sweeping Bay Area panoramas, plus off-leash areas for happy pups. Keep an eye out for the 1870s stone walls built by Chinese laborers and the old quarry that once supplied San Francisco's cobblestones.