Bureau of Land Management, Utah.
Knolls Special Recreation Management Area is nearly 36,000 acres of sand dunes, hills, and mud flats located in the Great Salt Lake Desert make a perfect OHV play area. Off-road fun is waiting, but stay within the boundaries, the Knolls OHV area borders a bombing range.Restroom facilities are available but there is no water. There is a $10.00 day use fee. Buy a pass on RECREATION.gov. https://www.recreation.gov/activitypass/knolls-ohv
80 miles west of Salt Lake City off of I-80. Take Knolls exit, and go south on overpass. Turn west onto old highway and go about 2 miles then turn south across the railroad track to enter the area.