Chinook Pass is a pass through the Cascade Range in the state of Washington. The pass is located on the crest of the Cascade Range, along a ridge between Yakima Peak to the northwest of the pass, and Naches Peak to the southeast. The boundary between Pierce County, west of the pass, and Yakima County to the east, coincides with the ridge. Terrain immediately west of the pass is in the Cowlitz River watershed. Terrain on the east side drains to the Yakima River watershed.