Washington has a small but varied collection of hot springs scattered across the Cascades, the Olympic Peninsula, and the Columbia River Gorge, ranging from private geothermal cabin resorts like Tenzen Hot Springs near Stevenson to historic mineral springs like Longmire Springs inside Mount Rainier National Park. Water temperatures span from cool mineral seeps in the 50s to backcountry pools exceeding 118 degrees, with most developed facilities holding their pools between 99 and 106 degrees for comfortable year-round soaking. Each listing below includes access details, water conditions and notes on facilities so you can plan your visit with current information.