Big Bear Lake is a mountain resort town in the San Bernardino National Forest, about two hours east of Los Angeles. At 2,060 metres elevation, it is the closest thing Southern California has to a proper four-season mountain destination — snow in winter, warm dry summers, and autumn colour from the surrounding pines and oaks.
The town wraps around a seven-mile alpine lake that sits in a high valley between forested ridges. In winter, Big Bear Mountain Resort draws weekend crowds from the LA basin. The skiing is modest by Colorado or Tahoe standards, but it is close and affordable, and the terrain park scene is strong. In summer the lake takes over: kayaking, fishing, and swimming, with mountain biking trails radiating into the surrounding forest.
One surprise: the lake's thermal properties make it one of the best sites for solar astronomy in the northern hemisphere, and the Big Bear Solar Observatory sits on a causeway extending into the water, its dome visible from the north shore road. Big Bear works best as a weekend escape rather than a week-long destination. If you are coming from Los Angeles, the drive up Highway 18 through the switchbacks is scenic but slow; give yourself extra time in winter when chains may be required.