If you want to go somewhere for a park, hit Summit Central int eh Cascades. If you watn to actualyl ski, head for Crystal. Skipe the chair lines, and runs which connect to the chairs. The skiing won't be very good in teh summer. Howeve,r if you hit the south of North Backcountry, you can get some quality stuff. It's better in winter, but summer will do. Ride High Campbell, and take the cattrack across Campbell Basin. You can catch a trail that takes you to Avalanche Basin, the next Basin over from High Campbell Basin, or you can continue and catch Silver Basin. The South Backcountry is the best for skiing, but i'm not sure how good it will be in the summber. If you want to go North Backcountry, take the Rainier Express and follow the signs to a cattrack. You can get off the cattrack at vcarious points, and have one helluva time. And if you don't want to spend all the energy of hiking, you can always just take random charis and ski all you can. It's up to you.