Henry Cowell Redwoods State Park is a pretty popular state park in Santa Cruz County near Felton and the University of California Santa Cruz. This park is one of the best 7 or 10 places to see redwoods in California, along with the nearby Big Basin park which has a nice grove. In addition to seeing redwoods, you can go hiking, fishing, camping, bird watching, and enjoying horse and dog friendly trails. If you really want to explore, you could end up on the shore of the San Lorenzo River, with some pretty overlooks and views of the Santa Cruz mountains. The most popular trail makes a loop that is easy to follow.