South of Madras in the Ochoco National Forest, the Henderson Flat OHV trail system is part of the Crooked River National Grassland and is characterized by open juniper vegetation spread over steep to rolling hills and interspersed with dramatically beautiful red rimrock breaks. The trails overlook the Deschutes Basin with spectacular views of the Cascade Range. It provides 18 miles of casual OHV use covering 1480 acres and ranging in elevation from 3000 to 3400 feet.
The trail system is designed for Class I and Class III ATV's, which are quads, three-wheelers or motorcycles less than 50” wide. Henderson Flat is not an OHV park. Off-highway vehicles are allowed on designated routes and areas only. The trails are open to horses, mountain bikes and other recreationists, so please watch out for others and ride sharefully.
The trail system is open from April 1 through November 30. The best riding takes advantage of the cooler, more moist periods of early spring and late fall. Hot, dry conditions normally inhibit riding from mid-July through September. In extreme fire conditions, the rails may be closed to public use. Individual trails may also be temporarily closed for maintenance or reconstruction, or to provide resource protection.
To reach the trailhead from Madras, drive South on Highway 97 for 13.0 miles. Turn left on Norris Lane and travel east for 2.3 miles. Turn south (right) on Sherwood Dr. (Rd. 5750) go 1.5 miles. Turn left on NFD 1394 and travel almost 0.5 miles to the staging area. Or drive south on Highway 97 for 14.9 miles. Turn left on Park Lane and travel east for 2.1 miles to a left on Sherwood Dr. Go about 1 mile and veer right on NFD 1394. Go almost 0.5 miles to the staging area.
Note: This area requires a Oregon State OHV Sticker, spark arrestor and silencer (max 99db).
Overall, Henderson Flat ORV Trail System is the 12th most popular dirt bike trail of all 48 dirt biking rides in Oregon.