Sunol Regional Wilderness

Sunol feels farther from Silicon Valley than it is. Turn off Interstate 680 onto Calaveras Road and within minutes you are in a valley of oaks, sycamores and grazing cattle, with Alameda Creek tumbling over greenstone boulders. The East Bay Regional Park District's 6,859-acre preserve sits south of Pleasanton and east of Fremont, on the back side of the ridge that holds Mission Peak.

The district has started calling it Sunol Wilderness Regional Preserve, though most people still say Sunol Regional Wilderness or just Sunol. It is a good choice when you want a real hike without the crowds of Mission Peak: a creekside walk to the gorge locals call Little Yosemite, a steep climb up Flag Hill or a full day on the ridges. This guide covers the drive, hours and fees, trails, rules and the closures in place on November 1, 2026.

Getting there

From Palo Alto, allow about 45 minutes. Cross the Dumbarton Bridge on Highway 84 and follow Interstate 880 or local roads to Interstate 680 north, or go around the south end of the bay on Highway 237 and 680. The park district's directions from Fremont: drive north on I-680 and exit at Calaveras Road near the town of Sunol. Turn right onto Calaveras Road and go about four miles to a left turn onto Geary Road, which leads into the park.

The district adds a useful warning. If you find yourself driving uphill on a narrow winding road, you have missed the Geary Road turnoff. To reach the Old Green Barn, take the first left after the park entrance.

There is no public transit to Sunol. The Dumbarton toll is collected westbound only: $8.50 in 2026 and $9.00 with FasTrak from January 1, 2027. See our East Bay travel guide for the bridge.

Hours and fees

• Parking: $5 on weekends and holidays, $5 per trailered vehicle and $25 per bus. Cash, Visa, MasterCard and Discover.
• Maguire Peaks trailhead: parking on Welch Creek Road needs a permit on Saturdays, Sundays and holidays ($5). Weekdays are free. Ask at the entry kiosk or visitor center.
• Visitor center: Fridays 9 a.m. to 1 p.m.; Saturdays, Sundays and most holidays 8:30 a.m. to 4 p.m. Closed other days, including Thanksgiving and Christmas Day.

Confirm details on the official park page before you go.

Closures and fire rules

On November 1, 2026, the district's alerts page listed two notices for Sunol:

• Shady Glen Trail: closed (updated October 31, 2026).
• No open fires or barbecues of any type. Gas-fueled stoves are permitted only at Alameda Grove and School Camp.

Wikipedia notes that the park can face closure or fire restrictions during the wildfire season from June through October. On Red Flag days, check the alerts page before you drive out. Our air quality guide covers smoke days.

The visitor center

Naturalists at the visitor center suggest trails, share recent animal sightings and introduce their animal ambassadors: a gopher snake, a rattlesnake, a western toad, a western pond turtle and a tarantula. The Sunol Herbarium holds samples of more than 600 plant species found in the park. A wildflower identification kit can be checked out in spring. The visitor center is accessible, as are the restrooms around the parking area.

Naturalist programs run most weekends. The district's calendar for November 2026 lists Women in Wilderness: Winter Watercolors on November 7, a drop-in Tracks on the Trail walk on November 8, a Season's Family Stroll on November 15 and a Moth Talk 'n Draw on November 21. Some need registration.

Trails and the Alameda Creek Overlook

Alameda Creek Overlook (Little Yosemite)

The park's best-known sight is a gorge on Alameda Creek about two miles upstream from the visitor center, where the water squeezes between huge boulders. The district renamed it the Alameda Creek Overlook. It sits on San Francisco Water Department land, open to visitors through a lease. Stay within the boundary signs. Swimming and wading are banned in Alameda Creek and everywhere else in the park because endangered species live in these waters. The Canyon View Trail leads there through Jacob's Valley; the wide road along the creek is the easier walk.

Trail mileage

The district publishes one-way distances for its main trails:

For a classic half day, walk up the creek to the overlook, climb back over the hills on the Canyon View Trail and finish at the visitor center. The Indian Joe Creek nature loop suits children. The district asks hikers not to cut switchbacks or slide down grassy banks, since the erosion is costly to repair.

Backpacking and the Ohlone Wilderness Trail

The Sunol Backpack Area takes reservations only, made 2 or more business days ahead. Call the district's reservations line at (888) 327-2757. The Alameda Grove picnic area can also be reserved by phone.

Sunol is a gateway to the Ohlone Wilderness Trail, which crosses San Francisco Water Department land between Mission Peak and Del Valle Regional Park near Livermore. For years hikers needed a paid Ohlone permit. The district says that as of January 1, 2026, the permit is no longer required and no more will be sold. Camping along the trail still needs a reservation 2 or more business days ahead. Our camping guide compares other backcountry sites.

Dogs, bikes and horses

• Dogs: park district rules require a leash of 6 feet or less in parking lots, picnic areas and developed areas, within 200 feet of trailheads and wherever grazing animals are present. Cattle graze across Sunol, so expect to keep your dog leashed on much of the park. Dogs are banned in wetlands and marshes. Keep them out of the creek too: the district warns about salmon poisoning and algae in waterways. See our dog-friendly hikes guide.
• Bikes: biking is one of the park's listed activities. District-wide, bikes are allowed on most wide multi-use trails and banned on most narrow ones; the park brochure map shows which. Class 1 pedal-assist e-bikes may use any trail open to bikes. The speed limit is 15 mph.
• Horses: horseback riding is a listed activity. The Ohlone Wilderness Trail is open to riders.
• Climbing: Wikipedia notes that the Cave Rocks formation is popular with rock climbers.

Wildlife, wildflowers and safety

Bedrock mortars used by Native people to pound acorns survive here. For the past century the land was ranched. Cattle still graze it under the district's management policy. Ground squirrels, yellow-billed magpies and red-tailed hawks are everywhere. The district says 20 to 40 bird species are often seen in a single morning along Alameda Creek, with golden eagles commonly sighted. Our birdwatching guide has more spots.

From about the end of March to the beginning of May, poppies, goldfields and lupines color the hills. The district publishes a wildflower pocket guide and plant checklists for the park.

What pairs nearby

• Mission Peak: the steep summit hike on the Fremont side of the same ridge.
• Livermore Valley: wineries 20 minutes north along I-680 and Highway 84.
• Niles Canyon Railway: its trains depart from Sunol on selected weekends from March through October. The 2026 season has ended; our Fremont guide has fares and the 2027 outlook.

Frequently asked questions