Welcome to Crestline, California—the closest mountain resort town to the major cities of Southern California. At scenic Lake Gregory in the San Bernardino Mountains, visitors may enjoy fishing, boating, swimming, sunbathing, and waterslides. Fitness buffs will find many hiking and biking trails, and Lake Gregory is ringed by a state-of-the-art fitness trail with exercise stations. Shoppers will find unique stores in our historic Old Town area and along Lake Drive in Crestline. The hungry have many great choices for dining. We welcome you to Crestline and Lake Gregory.