North of Sonora, the Niagara OHV Area has several routes open to OHV users.
To reach the riding area take Hwy 108 north out of Sonora to FR 5N01. Go right on 5N01 to the Niagara OHV area.
There are several trails in this OHV area:
Niagara Rim Trail
This is a one-way route that begins 5.2 miles east of the junction of Hwy 108 and 5N01 (Eagle Meadow Rd.). It is a combination of dirt roads and true 4WD trails. There are several access adn exit locations along the dirt roads. The trailstarts up a ridge before dropping into a draw. Once you start down into the draw you cannot turn around and go back so be sure you can drive this section before dropping down. The trail then climbs up "heartbreak" hill and drops steeply down to an unimproved dirt road. This 1.2 mile section is considered advanced to intermediate. After .5 miles of dirt road, teh 2.3 mile long Section 2 begins. This section is intermediate if you stay on the main trail, but there are two offshoots rated expert; the Lions Butt and Rock Pile. The Lions Butt winds through and around rock outcrops. Watch your rear bumber! The Rock Pile is for expert drivers only. It is not long, but very challenging as you inch and crawl up and over boulders and rocks and then descend across rock slabs with crevices. There is one exit from the Rock Pile if it is too difficult, otherwise once you start you must finish. The trail continues 1.5 miles on dirt roads to the .7 mile Section 3 which is expert. This section climbs part way up and then follows below Double Dome Rock. Drivers traverse the trail while leaning with the slope.
Long Valley Road: 5N01A
This 3.5 mile route is easy to intermediate. The trail starts at the Long Valley dispersed camping area and follows Long Valley Creek for the first mile with many scenic meadow and mountain views. The trailstops at a turn-around/parking area where you can camp or hike. There have been problems with drivers continueing past this point and causing resource damage. Further damage could result in closures so please respect the closed signs.
East Flange Road :5N01
This trail is intermediate until you reach the Silver Mine Stream crossing which is expert. From the parking area at the end of the trail at the wilderness boundary (no motorized vehicles allowed), it is a short walk to a scenic overlook with views of Upper Relief Valley and Resevoir.
Eagle Peak Trail: 5N74
Road 5N74 is 5.7miles long and intersects 4N12C at 3.1 miles. The first section is east to intermediate with an expert offshoot called the "Chute." From 4N12C to the end of the trail is expert. 9400 feet Eagle Peak can be reached by a short 800-yard hike from the end of the 5N74 road.
Madhatter Rim Trail: 5N67
This trail is 10.7 miles from Hwy 108 on 4N12. The 2.7 mile trail runs along a ridge between the Waterhouse and Cooper Meadow parking areas. This trail is intermediate to expert because of the loose soil and side hilling along the route
Overall, Niagara OHV Area is the 30th most popular OHV & 4wd jeep trail of all 102 OHV routes in California.