Walla Walla
https://cascade.org/rides-and-events-tours-cascade-club-tours/fall-walla-walla-tour-lite
Idaho Panhandle
https://www.pegasusbiketours.com/_files/ugd/f4f9b0_efda0ffee18f4aa787b4e66ac782f6aa.pdf
(Howard and I have done parts of this route and it was one of our favorite tours)
Willamette Valley
https://www.pegasusbiketours.com/_files/ugd/f4f9b0_d2ba491b58624e94ab4799597b2d029b.pdf
Fall Ride – Klickitat State Park Trail
Klickitat State Park Trail – from Lyle, WA to Klickitat, WA (or vice versa)
https://www.parks.wa.gov/869/Klickitat-Trail
Klickitat Accommodations https://klickitatriverinn.com/
Lyle Accommodations
The Lyle Inn is expensive, so some sleuthing of an alternate place would be needed
Rollie’s additions:
I think the 32 miles must be to Goldendale
https://ridewithgps.com/routes/39217713
A while back I found this
https://buckyrides.com/chenoweth-upness/
Same general area and billed as a good fall ride.
And here are more options in the area
https://dirtyfreehub.org/gravel-search/?lat=45.450539&lng=-121.123729&zoom=9&cat=5&cat=2