North of Rock Springs, on the 38,600 acre Killpecker Sand Dunes there are over 10,000 acres open to OHV vehicles. The Greater Sand Dunes ACEC is located in north central Sweetwater County.
To reach the OHV trailhead for Killpecker Sand Dunes from where Tri-Territory Road (County Road 4-17) leaves US 191 head east and then north on CR 17. Go 14.75 miles to a fork, stay right. Travel 3.5 more miles, then take a left. At 1.85 miles further take another left. Go just over one half mile to a left. Stay right to parking lot. Look for signs.
To reach the trailhead from Rock Springs, head north on US191 for 11 miles. Turn north on CR 11 (Chilton Road) for 22 miles.
Overall, Killpecker Sand Dunes is the 8th most popular OHV & 4wd jeep trail of all 8 OHV routes in Wyoming.