The Gravity Card finally has Snow Summit and Mammoth discounts. Baller!! And if you have kids that need cards too, email. Those are made for way less cashish. And card profits go toward all those other bike park projects going on in SoCal. So 2 good reasons to have one.
https://www.facebook.com/MtbGravityCard
http://www.mtbgravitycard.com/
https://www.facebook.com/MtbGravityCard
http://www.mtbgravitycard.com/