Here’s some bike links to help you out.
Though not as common or as popular as biking to The Coast, The Columbia Gorge, or north to Seattle and Vancouver, BC, there is a decent route down the valley known as the Willamette Valley Scenic Bikeway.
Portland is a great place for bicycle touring, and the Hawthorne Hostel is an awesome base for your Northwestern bicycle exploration!
If you’re heading to or from the east on bicycle, you’re in for a treat! The Columbia River Gorge offers excellent riding and unparalleled scenery.
Chances are if you are bicycle touring through the area, you’re either on your way to or from the Oregon Coast in order to ride the Pacific Coast Bicycle Route. If you are, you are in store for a great ride! And these directions will help you bike between Portland and the coast.