I may be a few years too late with this question, but I'm wondering if there are any low traffic areas to ride in. General requirements:
1) WA state
2) 2 to 4 hour ride time
3) 20 to 60 mile ride length
4) mostly on road (paved and/or unpaved)
5) more interesting than riding the same 1 mile backroad multiple times to get the mileage
6) low traffic being maybe 1 motor vehicle every 10 minutes
Personally, I can't think of anywhere in the state with rideable roads and little to no traffic.
Thanks for riding along......