Shift 2 Bikes is an independent calendar of Portland bike events. Get involved and have fun!
The Oregon Bicycle Racing Association (OBRA) keeps a calendar of Oregon bike races.
The Bike There map shows Portland and regional bike routes and connecting points for buses and trains. Waterproof copies of the map are for sale at the shop ($6).
The City of Portland has mapped and detailed many of the area's nicest rides.
Bikeportland.org is a great resource for Portland bike news, advocacy, and fun.