Take the train
There are two types of Amtrak trains on this route. The Cascades Train allows for unboxed bikes. You will need to make a reservation for your bicycle. Coast Starlight train requires bikes be boxed.
Amtrak reservations for passengers and bicycle storage space are required. Tandem, recumbent, or other unusual bikes must be boxed. Folding bikes are sometimes allowed as a carry on. For more information, call Amtrak at: 1-800-USA-RAIL (1-800-872-7245) or visit the website. Train routes include the Amtrak Cascades and the Coast Starlight. For additional information, visit Bring Your Bicycle Onboard.