Snow Summit and Bear Mountain (both belonging to same company called Big Bear Mountain Resorts) have the reputation as the best ski resort in southern California. I'm not sure that's really saying much. It's right up there with being the best weatherman in San Diego. That said, Snow Summit does offer a ski slope, even some labeled double black diamond. The thing going for it is that it's really close to Los Angeles (and even San Diego), so it's really easy to get to, but the knocks against it is that the snow is usually not that great and it's usually quite crowded on the weekends. Probably the best time to go would be during a weekday with fresh snowfall. This resort is also good if you're a beginner, as most of the runs are fairly easy (yes, even the black diamonds). If you're an expert, well, you probably don't want to waste your time here.