Looking for dirt from Bothell to Omak

Hey,
I need to find the DIRT between Bothell, WA and Omak, WA.  I read about a ride from Peshastan to Conconully, with would work great for me.  Is there a particular Map you could recommend.  I have NO GPS. 
Thanks in Advance for any help, ideas, company, warnings, tips, & tricks. 
U-Turn

The route from Peshastin to Conconully is probably the northern 1/2 of the WABDR. You can buy maps at MC shops, here in Wenatchee Power Sports had them. You can also go to the BDR web site, (search WABDR) and you can order them there also. The northern part of the route I thought was the funnest !