Backpacking Washington: Overnight and Multi-Day Routesbr Donwload Here The most comprehensive backpacking guide to Washington State! Veteran guidebook author Craig Romano hits the trail again - this time to uncover amazing backpacking opportunities all over Washington s wilderness. BACKPACKING WASHINGTON details 70 routes, from the wild Olympic Coast to the sun baked Blue Mountains. With an emphasis on weekend trips, routes range from overnight to weeklong treks and often include options for extending trips and choosing campsites.