Lake Mathews area of Riverside. Who ever gets here? Good aerobics. Remote. Nary a person. Not a scintilla of shade (forget about doing this in the summertime). Just fun riding rolling hills and trails with lots of ups and downs. A few good pencil thin singletracks to boot. Caution on some descents. Thanks to Hammertime for the ride idea. DIRECTIONS: Take exit 55b (La Sierra Ave) on Highway 91. Head south on La Sierra Ave. for 2.6 miles. Turn RIGHT on Lake Crest then LEFT on Lakepoint. Passing Sun Lake Park, find parking anywhere on the side streets. Dovehill Dr. works best.