Check out Exchange Cycle Tours... ECT. They do a lot of cool activities and interesting excursions. There is a Yahoo Group with info:
I know the OHPV crowd has a female trikist or two. They have lots of nice routes and events.
Great people in both groups and both welcome trikes.
Portland Velo will accept trikers but be prepared to be snubbed.
If you ever want some guided tour on the Westside, bring fiance along and we can explore the open countryside.