Mountain Adventure Seminars

California Rock Climbing School and Guide Service

MAS Fall Climbing Calendar Update – MAS enjoyed a super busy Winter, Spring and Summer of 2017. Instead of setting a schedule of Fall courses, we are keeping the calendar open for privates and groups. Please contact us if you would like to book a date for Bear Valley or the South Lake Tahoe locations of Lovers Leap, Phantom Spires or Sugarloaf.

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.

Courses We Offer

Privates & Groups

MAS offers privates for individuals and groups seeking training and challenges outside the scope of the regular MAS calendar.

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Avalanche Education

MAS AIARE Avalanche Courses provide a thorough and "hands-on" understanding of avalanche hazards.

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MAS strives to develop people's mountaineering skills and appreciation for the alpine environment.

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Skiing & Snowboarding

MAS and Bear Valley Mountain offer an exciting and unique experience for advanced skiers and snowboarders.

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Bear Valley Freeheel Race Series

The Bear Valley Freeheel Race Series is three separate ski mountaineering events which tackle a different course for each race.

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Rock Climbing

The MAS Outdoor Rock Climbing School is one of California's most comprehensive programs with instructional and adventurous trips.

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Ebbetts Pass Century Ride

The Ebbetts Pass Century Ride (EPC) on Aug. 19, 2017 is excited to announce that Markleeville, home of the Death Ride, is now a support station for the EPC century ride. As always the EPC offers 4 ro

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If you enjoy hiking and visiting wild places you'll be thrilled with snowshoeing and experiencing the marvels of winter.

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Annual Bear Valley Events

MAS hosts several popular annual events in Bear Valley which celebrate both the natural beauty and opportunity for outdoor adventure right out our backdoor.

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Upcoming Courses