Near Huntsville, the 700 acre General Sams Off-Road Park is open to OHV users. There are over 35 trails.
To reach the trailhead from Houston, take exit 123 FM 1696 off I-45 (4miles North of Huntsville). Turn left, then go West (under the overpass) 2 miles on FM 1696 to HWY 75. Turn right (North) on HWY 75 and go 5 miles *. Turn left on Bishop Road and go 1 mile. The Red Gate will be open.
Overall, General Sams OHV Park is the 6th most popular OHV & 4wd jeep trail of all 15 OHV routes in Texas.