I pedaled the coastal route from Astoria to SF in June/July 2000. Traffic was moderate, sparse in some areas. Scenery was breathtaking. Extremely stiff winds everyday going north. Start in Astoria and go to SF if possible. The winds will quadruple your effort and break your spirit. Going south gives you better views of the ocean and weeeeee tailwinds! You also have more turnouts and blend in with traffic when riding faster.