If you haven't been to Northern California, or haven't been in a while, here are some suggestions- all the way from an hour or two south of where we are, to a few hours north.
Henry Cowell Redwoods State Park
Felton, CA 95018
Garden of Eden
CA 95060
Gazos Creek State Beach
CA 94060
Carmel-by-the-Sea
Carmel-by-the-Sea, CA 93921
Napa
Napa, CA
There are many wineries and great things to do in Napa.
Mount Tamalpais State Park
3801 Panoramic Highway, Mill Valley, CA 94941
Point Reyes National Seashore, Inverness, and Bolinas.