With conical spires resembling the walls of an ancient castle, Castle Rock is named for the volcanic tuff formations that line the trail's end. Along the easy, graded track, numerous ATV and hiking trails can be found, and you will also pass the Belknap Ranger Station Interpretive Area, which takes explorers back to the early European inhabitation of the canyon.
The trail ends at the Castle Rock Campground, an excellent base for exploring the area. The nearby Fremont Indian State Park operates the Fishlake National Forest facility. Thirty-one sites can accommodate tents, smaller RVs, and trailers. The campground even boasts a teepee site for adventurous campers. Each site has a fire ring, grill, and picnic table. Water spigots are scattered throughout the campground. A central bathroom has flushing toilets and a sink.