Big Bear is something like 45 mins to an hour away. Its like 95% snowboarders though, seriously. Lots of small/medium sized jibs and tiny jumps. Heres a video we put together from a weekend there. I couldn't imagine having it be your home mountain though. There is no good terrain as far as all mountain stuff. Just for jib rats.
48 Hours of Big Bear with Parker White and Forest Bailey from Junction 133 on Vimeo.
Mountain High will be your best bet as it is closer and far less crowded than Bear/ Summit.
A realistic drive time on a good day for Mt High is an hour and 15 minutes. I have spent over 4 hours driving up only to head back home without getting out of the car. There can be that much traffic that they close the road there unless you live in Wrightwood.
i have lived in southern california for six years now and have had passes to both mt high and big bear. i live in pomona which is half an hour to hour and half From Los angles depending on what time of day it is. It takes me without serious traffic 50 min to get to mt high and 1.5 hours to get to big bear. Both mounatins are 95% snowboarders and all park. Big bear has a more consist park and their jumps are usally nicer then mt highs. Mt high has a legit park but sometimes how they set up their is jumps is really stupid. Mt high has more creative jibs then bear. weeekends at mt high are rediculess and should be avoided if possible. i mostly ride mt high because i can go before or after class easily (open from 8:30 to 10 pm everyday). if you have the extra time big bear is better but both are fun parks to ride.
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I don't mind Mt High. They're small enough that they can do creative and sorta dangerous things. They had a 70 foot jump for a little while this year. I don't know of too many mountains that have jumps that size open to the public. Big bear has better maintained features but it's too far for me to drive regularly.