From Seattle/Metro Area:
Take I-90 East to:
From Cle Elum/Ellensburg/Spokane:
Take I-90 West to:

Tuesdays through Sundays, The Summit at Snoquamlie provides complimentary intra-resort shuttles. The Summit runs anywhere from 2-5 shuttles on a continuous loop between base areas depending upon business levels. Shuttles should be arriving at each base area roughly every 20 minutes (weather and traffic dependent).
Below are a couple suggested transportation services to The Summit.
Carpooling - Share the gas and the fun!

$35 round trip with possible discounted lift ticket. Tuesdays, Wednesdays, Saturdays and Sundays, picks up in West Seattle and Downtown Seattle. Reservations are required. For more information and to inquire about reservations, visit their website or call 206-953-0237.
$38 round trip, family rates available. Friday through Monday; picks up in Federal Way, Seattle and Bellevue. For more information and to inquire about reservations, visit their website or call 206-878-3965.
Tuesday nights, picks up in Belltown, the U-district and Issaquah. For more information and to inquire about reservations visit http://www.graylineseattle.com/skitrips.cfm/mode/detail/product_id/1345.
A van and bus charter company that does several ski trips to The Summit every week.
http://www.customizedtours.net/
Looking for information on parking?