The Mountaineers is a Seattle-based nonprofit outdoor education organization founded in 1906, dedicated to enriching lives and communities through outdoor adventure and conservation. The club has published authoritative guides on mountaineering, climbing, hiking, and backcountry skills for over a century through its publishing arm, Mountaineers Books. Their seminal work "Mountaineering: The Freedom of the Hills" has been the definitive instructional text for climbers worldwide since 1960, spanning multiple editions. With thousands of members and volunteers, The Mountaineers continues to promote safe, responsible outdoor recreation while fostering environmental stewardship and wilderness preservation across the Pacific Northwest and beyond.