Frank Rains OHV Park is located not far from Patterson, CA. It is open to 4x4s from sunrise to sunset with a $5 admission fee per vehicle. The park is open to all OHV vehicles, so watch out for dirtbikes, quads, and SXS.
Matt's Hill is a difficult trail, rated a black diamond by the park's rating system. Most of Matt's Hill is similar to the rest of the trails in Frank Raines, with loose dirt, steep hills, and medium ruts. However, Matt's Hill has one challenging obstacle, possibly making it the toughest trail in the park. This obstacle is a very steep hill, with a sharp turn and a deep rut on the inside of the turn. There is not enough space for a full-size vehicle to go around the rut, so you have to straddle it while ascending or descending a pitch over 30 degrees. Descending is far easier than going up the hill, but the loose dirt causes traction issues in either direction. At the top of the trail, Matt's connects to Truck Trail and Spider Trail.
Deer Creek Campground is located at the park's entrance. The campground has 34 sites with picnic tables, restrooms, and other amenities. Prices range from $15 to $30 per site.