San Bernardino Mountains, part of the Coast Range, S Calif., extending c.60 mi (100 km) NW and SE through San Bernardino and Riverside counties. Notable peaks are San Bernardino Mt. (10,630 ft/3,240 m) and Mt. San Gorgonio (11,485 ft/3,501 m). This region embraces the mountain resort and recreational areas around Gregory, Arrowhead, and Big Bear lakes, in the San Bernardino National Forest.