The park is a wilderness area and most of it is extremely rugged lava rock. Visitors should prepare adequately for their visit. While there are over twenty miles of park trails by which to explore this beautiful geographical wonder, please be advised that travel off the trails requires proper preparation and equipment. Be sure someone knows where you are going and when you expect to return.
It is reached from McArthur by turning north off Highway 299 on to Main St., continuing past the Intermountain Fairgrounds, crossing over a canal and proceeding 3-miles north on a graded dirt road.
http://www.tripleblaze.com/trail.php?c=3&i=3467