PNW
The Pacific Northwest region covers both Washington and Oregon, which are directly north of California. Abundant coastlines, waterways, islands, with mountains with forests, rivers and waterfalls. Summer is the best time to camp in this state, as it rains most often in other months.

Books for Washington State: Hike, Bike, Fish, Kayak, Explore

see also – 

Columbia River Map
PCT Map 9 – Southern Washington
PCT Map 10 – Northern Washington