Castle Rock State Park
Castle Rock State Park is a land of sculpted sandstone, lush forests and sweeping vistas. From one of the highest ridges in the Santa Cruz Mountains, park visitors enjoy hiking, backpacking and horseback riding. Rock climbers explore the park’s caverns and rocks, including the namesake Castle Rock. Plant-lovers come for California black oaks, knobcone pines and high-elevation coast redwoods. The park’s 34 miles of rugged trails conveniently connect to an extensive trail system that links the Santa Clara and San Lorenzo valleys to nearby Big Basin Redwoods State Park and open space preserves on the Skyline to the Sea Trail.
Learn more in the California State Parks brochure.
Located on Highway 35, just 2.5 miles southeast of the junction with Highway 9. From San Jose or Santa Cruz, takeHighway 9 toHighway 35. Turn south onto Highway 35. Drive about 2.5 miles and look for the park entrance on the right side of the road. From Highway 280 in San Mateo County, take Highway 92 west, then turn south onto Skyline Boulevard (Highway 35). Drive about 25.5 miles, to the junction of 35 and 9 (Saratoga Gap). Continue about 2.5 miles further south on 35, and look for the park entrance on the right side of the road.
Things to doRock Climbing
Climbers have been scaling Goat Rock, Castle Rock and Vaqueros Sandstone outcroppings for nearly a century. The sandstones relative hard exterior and unique tafoni patterns are ideal for bouldering and climbing.Hiking and Backpacking
The park offers 34 miles of trails, many with steep and narrow slopes. The Skyline-to-the-Sea Trail connects Castle Rock and Big Basin Redwoods State Parks. The 5.6-mile Saratoga Gap and Ridge Trail Loop leads to Goat Rock, Castle Rock Falls, Russell Point Overlook, and the Castle Rock Trail Camp. Goat Rock Overlook provides panoramic views of the San Lorenzo Valley and the Pacific Ocean. The moderately difficult Ridge Trail is a potential place to see the endangered peregrine falcon. The Saratoga Toll Road, a historic logging road and stagecoach line from 1871, is now a well-shaded and graded hike offering some scenic viewpoints.Picnic Area
The Partridge Farm site has picnic tables and an interpretive shelter.Environmental Learning
Explore the interpretive exhibits.
A visitor center is being constructed for Castle Rock State Park. It will include an amphitheater for use as an outdoor classroom for students interested in environmental science as well as running water — which the park currently does not have — solar-powered pay stations, flush toilets and new trailhead signs.
Fees and Passes
Parking is $10 and supports the park. Castle Rock uses a self-service pay station. Please pay at the kiosk.
- Pit toilet
- Pay phone at parking lot and main backpack campground
- Primitive hike to campsites for backpackers
- Trails for horseback riding (call ahead)
- Accessibility: The 0.08-mile accessible path from Castle Rock parking lot leads to an ADA-compliant picnic table with woodland views. Parking and pit toilet at the end of the trail may require assistance.
Two trail camps — Castle Rock with 20 primitive sites and Waterman Gap with 6 primitive sites — are available. Both camps have water and pit toilets. An inclement weather shelter at Castle Rock Trail Camp provides a roof during storms. The primitive campsites are for backpackers only and cost $15 per night. Limit six people per site. Reservations: Call Big Basin Redwoods State Park at 831-338-8861 or go online to learn more about trail camps.
Fires are permitted only in designated fire rings in the Castle Rock Trail Camp during the off fire season. Gathering firewood, including twigs and leaves, is prohibited. Firewood is sold at the Castle Rock Trail Camp.
Quiet hours are 10 p.m. to 6 a.m. daily.
View the campground map here.
Judge Joseph Welch of Santa Clara Valley purchased a 60-acre parcel on Castle Rock Ridge in 1908, when logging was still ravaging the hillsides. He established a precedent by opening his land for the public to enjoy its scenic vistas and rugged landscapes. With Welch’s determination, Castle Rock soon became a popular tourist destination.
Dr. Russell Varian, a pioneer of X-ray and radar technology, spent much of his youth exploring and hiking the canyons near Castle Rock. Varian was the first to measure Earth’s magnetic field, using some sites in today’s park. In 1959, he secured an option to purchase this land and planned to donate it to California State Parks. Varian died before completing the purchase.
The Sierra Club and Sempervirens Fund later donated the land in his memory. Castle Rock was designated a State Park in July 1968. In 2011, Castle Rock was one of 70 State Parks set for closure by Gov. Jerry Brown. A partnership of Portola-Castle Rock Foundation, Save the Redwoods League, Peninsula Open Space Trust and Sempervirens Fund donated 250,000 to protect the park from closure.
- Campgrounds are “Crumb Clean.” Visitors are required to watch this short video about the impact your food has on park wildlife.
- Dogs are not permitted in the park.
- Glass containers and smoking are prohibited throughout the park.
- Bicycles may be ridden only on the Skyline and Service Road trails.
- Horses are permitted on designated equestrian trails only.
- Firearms or any device capable of harming any person or animal are prohibited, including BB guns, spears, bows, arrows and slingshots.
- Stay on designated trails.
- All natural and cultural features are protected by law. Do not pick wildflowers, mushrooms or other plants, or remove any park feature. Do not deface rocks with graffiti, or feed, disturb, or harm wildlife.