Easy to get to from LA - 5 hrs, w/no traffic
Early season icey conditions
Moved to LA in June and my first trip of the season. It took me 5 1/2 hours to get to Mammoth leaving UCLA at 4 PM on a Thursday so ease of access is great. Early season skiing so it was kinda icey, but Mammoth is huge so you can always find what you are looking for although it's a little limited on beginner terain.