If I was riding from Stevensville, MT to Vancouver, WA ...
Stevensville to Lolo via northbound US-93.
Lolo to Clarkston via westbound US-12.
Clarkston to Enterprise via southbound WA-129/OR-3.
NOTE: Has tight downhill twisties from Rattlesnake Grade to Boggan's Oasis.
Enterprise to La Grande/I-84 via westbound OR-82.
La Grande to OR-244 via westbound I-84 to Exit 252.
OR-244 west to Ukiah/US-395.
Ukiah to Heppner via westbound NF-53 *or* northbound US-395 and westbound OR-74.
Heppner to Wasco via OR-206.
Wasco to Biggs Junction via US-97.
Cross the Sam Hill Memorial Bridge from Biggs Junction to westbound WA-14.
See
www.oregonmotorcyclist.com for more info on Oregon roads.