Dirt Bike Trails
Near Yountville, California

The main connector between the north and south entrances of the Knoxville OHV area. Very active with power sports vehicles, as many marked and unmarked trails crisscross this trail. An easy trail with good views of the mountains, including. Mt. Saint Helena in Napa. It also passes by the only develo...
Learn more about Dunnigan Hill

Easy dirt trail with connections to the Berryessa Snow Mountain Monument area Trails with wildflower sights in Spring and the main road to The Wilbur Hot Springs. Beautiful scenery of the Bear Valley in Lake and Colusa Counties in Spring with Bear Creek passing next to the trail. Near the end of the...
Learn more about Bear Valley Road Trail

Walker Ridge Road is one of the main entrances to the Indian Valley Reservoir (CDFW) and the Walker Ridge Recreation Area (BLM). The road is gravel and accessible by most high-clearance vehicles. There are plenty of OHV and 4x4 trails off the main road. Walker Ridge Recreation Area allows all types ...
Learn more about Walker Ridge Road to Indian Valley Reservoir Road

This trail will take you to a wetland area where multiple springs emerge from the mountainside. There is a dispersed camping area at the end where it turns into some hiking trails that give an excellent view of the Indian Valley Reservoir. The trail is narrow but doable in any 4x4 vehicle.
Learn more about Cold Spring

Bartlett Springs Road begins southeast of Mendocino National Forest and boasts excellent views. This route passes through BLM land, and there are plenty of offshoots from the trail. There are also opportunities for camping, hiking, mountain biking, fishing, hunting, and recreational shooting. Cell s...
Learn more about Bartlett Springs Road

For expert riders only, this trail is rated extremely difficult. Trail hazards may Include; narrow and steep sections, washed-out sections, fallen trees, and large falling or loose rocks. Boundary Tidge "Trail 25" is an 8-mile route that takes you along the top ridges of South Cow Mountain OHV. The ...
Learn more about Boundary Ridge, Trail 25

An easy scenic route over mountain ridges through South Cow Mountain OHV that connects lakeport to Ukiah. This is the main dirt road through cow mountain that has multiple harder trails off either side and has multiple campgrounds that are easily accessible by 2WDd vehicles. There are excellent view...
Learn more about Mendo-Lake Road

This trail is a little less than 4 miles and leads to Letts Lake and campground. As the only lake in the lower half of Mendocino NF, it is worth visiting. There are four campsites around the lake; each has a handful of first come, first serve sites. You may also swim and fish in the lake.
Learn more about Letts Lake

Out-and-back trail, big dispersed camp area at the end of the trail for multiple vehicles. There are a few spots to pass, and a dirt bike trail is towards the beginning. has a few ledges from erosion and some washes. Toward the end of the trail, before it descends into the camp spot, there is a good...
Learn more about Stony Slope - FS 17N89

This trail used to be longer, but erosion turned it into half just a dirt bike trail. This trial ends at a bit of a turn around that you could unload your bikes and hit the other trails from that point. It's also a connector to the Old Letts Trail. This trail is single vehicle wide, and there are a ...
Learn more about East Letts - FS 17N02k

This trail has many steep sections, including one big hill climb. Depending on the direction traveled, you can bypass that hill climb (bypass not included on guided trail). Single vehicle wide, and some areas are overgrown, causing pinstripes. Lots of off camber and many washes, some deep and some e...
Learn more about Old Letts - FS 17N12

Mostly a wide fire road connecting the road to Potato Hill Trail. There are some small washes, and it narrows at a few sections to one vehicle wide. Good views from the top of the trail. Seasonal close and will close for wet weather. Had a few low-hanging trees and a tree down across the top of the...
Learn more about Sanborn - FS 17N63

The trail immediately starts to climb the ridge. It gets very steep in some sections and requires high clearance to break over drainages, or you'll slide over them. Good views of the canyon and valley once you get high enough. Lots of off-camber areas and washes. The trail is tight and overgrown; yo...
Learn more about Potato Hill - FS 17N12

This trail immediately starts climbing. Has many rolling water drainages and rocky sections. Start to get good views of the canyon as well. Crossing a road and continuing on the other side, it's easy to see and is marked. Good warm-up before going on the Potato Hill trail that gets pretty steep.
Learn more about Champagne - FS 17N79

This is the beginning of the Letts Ridge trail. Past this is only for dirtbikes and other smaller OHV machines. This trail will also take you to the Champagne trail wh8ch also connects to Potato Hill. At the end is a big area to unload to do the rest of the Letts Ridge trail. A lot of whoops-style b...
Learn more about Letts Ridge Trailhead Entrance

This is a semi maintained fire road. From the South end starts out groomed and starts to get narrow on the shelf road. Some overgrown brush to get some pin stripes. There are multiple smaller washouts and one that you need to navigate carefully since the outside is sliding a bit.
Learn more about North Fork - FS 18N03

Franciscan Loop Trail is a fun route that circles the trails-only section of the park. The trail is generally double-track width with a hardpack dirt surface, making it accessible while still offering plenty of variety. Riders can expect a mix of terrain, including small whoops, loose dirt, and scat...
Learn more about Franciscan Loop trail

Carroll Climb is a fun, short detour off Juniper Trail. The route begins with a descent on a narrow single-track trail to a turnaround at the bottom. From there, riders tackle a climb back to the top through a series of whoops and rocky sections that add a bit of challenge and excitement. Though bri...
Learn more about Carrol Climb

Juniper Trail is one of the park's primary connector routes, linking riders to the broader trail network. The trail features mostly smooth hardpack dirt with a mix of winding turns, climbs, and descents that make for an enjoyable ride. As the route progresses, riders gain access to several steeper h...
Learn more about Juniper Trail

Brewers Trail is a short single-track spur branching off Juniper Trail. The narrow dirt trail is best suited for dirt bikes, as its width and terrain are not ideal for larger vehicles. The route winds along a hillside with a mix of hardpack dirt and scattered patches of loose rock. While the trail i...
Learn more about Brewers Trail

The main connector between the north and south entrances of the Knoxville OHV area. Very active with power sports vehicles, as many marked and unmarked trails crisscross this trail. An easy trail with good views of the mountains, including. Mt. Saint Helena in Napa. It also passes by the only develo...
Learn more about Dunnigan Hill

Easy dirt trail with connections to the Berryessa Snow Mountain Monument area Trails with wildflower sights in Spring and the main road to The Wilbur Hot Springs. Beautiful scenery of the Bear Valley in Lake and Colusa Counties in Spring with Bear Creek passing next to the trail. Near the end of the...
Learn more about Bear Valley Road Trail

Walker Ridge Road is one of the main entrances to the Indian Valley Reservoir (CDFW) and the Walker Ridge Recreation Area (BLM). The road is gravel and accessible by most high-clearance vehicles. There are plenty of OHV and 4x4 trails off the main road. Walker Ridge Recreation Area allows all types ...
Learn more about Walker Ridge Road to Indian Valley Reservoir Road

This trail will take you to a wetland area where multiple springs emerge from the mountainside. There is a dispersed camping area at the end where it turns into some hiking trails that give an excellent view of the Indian Valley Reservoir. The trail is narrow but doable in any 4x4 vehicle.
Learn more about Cold Spring

The main connector between the north and south entrances of the Knoxville OHV area. Very active with power sports vehicles, as many marked and unmarked trails crisscross this trail. An easy trail with good views of the mountains, including. Mt. Saint Helena in Napa. It also passes by the only develo...
Learn more about Dunnigan Hill

Easy dirt trail with connections to the Berryessa Snow Mountain Monument area Trails with wildflower sights in Spring and the main road to The Wilbur Hot Springs. Beautiful scenery of the Bear Valley in Lake and Colusa Counties in Spring with Bear Creek passing next to the trail. Near the end of the...
Learn more about Bear Valley Road Trail

Walker Ridge Road is one of the main entrances to the Indian Valley Reservoir (CDFW) and the Walker Ridge Recreation Area (BLM). The road is gravel and accessible by most high-clearance vehicles. There are plenty of OHV and 4x4 trails off the main road. Walker Ridge Recreation Area allows all types ...
Learn more about Walker Ridge Road to Indian Valley Reservoir Road

This trail will take you to a wetland area where multiple springs emerge from the mountainside. There is a dispersed camping area at the end where it turns into some hiking trails that give an excellent view of the Indian Valley Reservoir. The trail is narrow but doable in any 4x4 vehicle.
Learn more about Cold Spring