Bookcliff Campground resides near the swim beach and recreation area. May 14, 2012 by Matt ThomasBookcliff Campground resides near the swim beach and recreation area. Highline Lake State Park About Matt Thomas Matt is an avid writer and explorer, who loves to showcase his home state of Colorado. His favorite place to be is right here in the Centennial State. Previous Post:Bookcliff Campground resides near the swim beach and recreation area.