Mountain Adventure Seminars

Mountaineering and Guide Service in Bear Valley, California

Mountain Adventure Seminars (MAS) is a year-round mountaineering school and guide service based in Bear Valley, California specializing in rock climbing, mountaineering, avalanche education and backcountry skiing and snowboarding. MAS is owned and operated by Aaron & Kimi Johnson and is a reflection of their love for the outdoors and enthusiasm for playing, sharing and educating in “wild places”.  MAS has been operating since 1996 and is excited to be celebrating 20 years of fun and service.

Courses We Offer


MAS Resources Bear Valley Lodging & Camping: Bear Valley Lodge Bear Valley Vacation Rentals Tamarack Lodge Lake Alpine Lodge (summer only) Nearby Campgrounds Food & Dinning (coming soon)  

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

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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

The 9th Annual Ebbetts Pass Century is happening on August 20, 2016 with four routes to challenge a variety of cyclists.

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Avalanche Education

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

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

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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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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