Rim Nordic Ski Area, located  in San Bernardino Mountains is the only cross country ski area in Southern Calif. with machined groomed trails.  Lessons & rentals available for cross country skiing and snowshoeing.  Other events included  USA Cycling sanctioned mountain bike races, including Cross Country, Downhill & Super D events & trail runs. Some of the best single track trails & fire roads to ride & race in So Cal (without off road vehicles).