Riverside State Park: "Rattlesnake" Professional Review and Guide
"The initial gravel road is a 0.3-mile, 140-foot climb to the singletrack. The trail wanders another 180 feet up to the north side of Pine Bluff and down to the river through ponderosa pines, rock formations, some grassland, and low-lying shrubs.
The boundaries on this network are Pine Bluff road to the south and west, Carlson Road to the north, the Centennial Trail to the north and west, and Seven Mile Road to the east. Stay within the confines, and you're in for a great ride! A spaghetti system of trails where, because of the boundaries, you can get lost without getting lost."