Sledding Washington State

What are some sweet spots, snowmachine snowmobile or sled in the state of Washington?
I'm looking to find a good driving in Washington state. We would like some mountains and walks to open. I've looked on the website Washington snowparks and says nothing on the ground .. PLEASE HELP!
Well, it has been for many years for me, from riding in Washington, so the best place to start is with the web site of State Parks maps, then check out the website of Washington Snowmobile Association (both are attached below.) I used to go on the east side of the state of Chelan, Leavenworth and were great. Camai!
Sledding Sunnyside Hill, Pullman WA Dec 2008