California Rock Climbing School and Guide Service
Mountain Adventure Seminars (MAS) specializes in rock climbing, mountaineering, avalanche education, backcountry skiing and snowshoing in the Sierra Nevada Range of California. MAS is based in Bear Valley but also leads programs in South Lake Tahoe (Lovers Leap, Phantom Spires and Sugarloaf), Calaveras Dome and Matterhorn Peak in the High Sierra.
It doesn’t matter if you are new to the outdoors, or an experienced wilderness traveler, MAS has a wide range of courses and adventures. Contact MAS to explore options and we hope to see you out there soon.
MAS is owned and operated by Aaron & Kimi Johnson and is a reflection of their love for the outdoors and enthusiasm for recreating, sharing and educating in “wild places”. MAS has been operating since 1996 and is excited to be celebrating 20 years of service.