West of Santa Barbara, the Gaviota State Park has 12 miles of mountain biking through oak woodland and chaparral backcounty over 2,800 acres. There are plenty of scenic ocean vistas and you will want to check out Nojoqui Falls.
To reach the park from Santa Barbara, head west on US101 for 32 miles. Just before driving up a large hill, turn left on Gaviota Beach Road. Head down Gavoita Beach Road towards the State Park Campground. Just before the Campground entrance, veer right on Hollister Ranch Road for about 0.25 miles and look for unsigned parking area on the right.
After the ride, you might want to hit the sometimes nude Gavoita Hot Springs, which is located just north of park entrance.
Note: Mountain lions are present in the park.
Overall, Gaviota State Park is the 28th most popular mountain bike trail of all 132 mountain biking rides in California.