What about the Chuckanut century? There is a flat route that goes north of town into the county, and the hilly route that goes south of town onto Chuckanut. Full 100 mile rts and shorter ones.
I'm in the middle of a glass of wine and my "wind down time", but I'll look for the link soon.
(PS, it raises money for Whatcom County hospice, who helped us take care of my dad and keep him at home while he was dying. Good group, good cause, and from what I hear a good ride, too.)
Edit: here it is http://www.mtbakerbikeclub.org/Chuck...nutCentury.htm I'm bailing on the Danskin, but I'd really like to do the Chuckanut in memory of my dad and in thanks for the Whatcom hospice.