Followed up (if heading north) with McKenzie pass on the way to Sisters. Been trying to get back on these roads for a few years, but fires and riding mates running on empty have gotten in the way.
Further northeast: Shaniko-Fossil Hwy, 19 up to Condon, 206 from Condon to Heppner. Lots of great pavement, sight lines and little traffic between Condon and John Day and if you stay off of 26, almost no enforcement.
WA 129 south of Lewiston on the way to Enterprise with a detour through Joseph in order to get to NF 39 to Hells Canyon with a stop at the Hells Canyon overlook before dropping in to the canyon.
Hwy 66 east out of Ashland, turn left at Green Springs heading north past Hyatt Lake. Keep going north to Dead Indian Memorial with a left back down to Ashland or, just stay on 66 to get to Klammoth Falls.
Trail-Tiller hwy to avoid much of hwy 5 between Medford and Roseville.
South of Coos Bay, 42 past Myrtle Point with a right onto 542 through Powers to get to NF 33 (Rogue River Scenic Route) through Agness and 595 back to the Cost at Gold Beach to GTF away from the OSP and law abiding locals on the Oregon coast (Includes 8 miles of good quality dirt road).
Just to name a few.
Lived in Seattle for 11 years and I am hard pressed to get excited about any roads west of the eastern plain (Cascades west to the Pacific) other than hwy 20 (Cascade Mtn Hwy) to Winthrop, hwy 2 over Stevens Pass to Wenatchee, or around Mt Rainer. I used to love FR 25 south out of Randle up to Windy Ridge looking over Mt St Helens with a continuation south through Cougar and down to Hwy 5 for the run back north, but lately the roads seem to be in pretty bad shape. Once East of of the Cascade, I kind of need to be near the Columbia River to get enough elevation changes or much further east near the Snake in order to find interesting roads
Flip