Highway 313 on the way to Dead Horse Point State Park and Canyonlands Island in the Sky has a niace turn out and back in before the cattle guard at the bottom of the switchbacks, providing plenty of room to park off the highway.
The cache is a moderately difficult but fun and scenic climb 40 yards or so from the parking area. It contains a log and a pencil, but you can bring your own pen if you prefer to use ink.