Mountain Adventure Seminars

Welcome to California Rock Guides & California Ski Guides

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(formally Mountain Adventure Seminars )

Use promo code: fallsale19

Full Payment required for discount, cannot be combined with any other discounts or reduced pricing, excludes international expeditions & treks  — give us a call — 888.797.6867

We’re excited to announce that Mountain Adventure Seminars (MAS) and SWS Mountain Guides (SWS) have combined guide services, along with our sister companies California Ski Guides (CSG) and California Rock Guides (CRG), to give you more mountaineering, skiing and climbing adventures, courses and clinics than ever before in California! By blending the same fantastic courses, climbs and service offered by MAS with SWS’s large venues – from Mount Shasta in the North to Mt. Whitney in the South – your outdoor adventure possibilities are endless!

SWS was founded by Timothy Keating in Mt. Shasta in 1981 and is celebrating 36 years of guiding adventure lovers into the California wilderness. MAS was founded in Bear Valley in 1996 and brings 20 years of outdoor adventures to our guiding family.

SWS is led by Timothy Keating, David Cressman, and JB Brown and is a reflection of their love for the outdoors and enthusiasm for introducing, sharing and educating others in “the wild places.” The main office and bunkhouse are located in Mt. Shasta, with additional offices in Lone Pine and now, Bear Valley, California.

“We are thrilled to bring Bear Valley and all MAS courses into the SWS family.”

MAS/SWS NOW operate the broadest range of programs in the most venues in California of any guides service: Mt. Shasta, Mt. Whitney, Mt. Russell, Pinnacles, Castle Crags, Alabama Hills, Crystal Crag, Bear Valley, Lover’s Leap, Calaveras Dome, North Palisade, Temple Crag, Mt. Sill, The Incredible Hulk, International Expeditions and much more!

Winter adventures include mountaineering, ice climbing, avalanche education, and backcountry ski/snowboard, telemark and snowshoe adventures.

Summer adventures include mountaineering, rock climbing, trekking and more!

Find your adventure today on one of our websites or call 888.797.6867  / /


Courses We Offer

Mountaineering 2019

MAS / SWS strives to develop people's mountaineering skills and appreciation for the alpine environment. Now with new locations in California including Mt. Shasta and Mt. Whitney!

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Rock Climbing 2019

The MAS/SWS Outdoor Rock Climbing School is one of California's most comprehensive programs with instructional and adventurous trips. Now with more venues than ever!

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Avalanche Education 2019

MAS/ SWS Certified AAA Avalanche Courses Level 1 and Level 2. FREE - Avalanche awareness clinics at all Bay Area REI's Check it out!

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Privates & Groups 2019

MAS / SWS offers private custom climbs, courses, and expeditions for individuals as well as custom groups climbs. Give us a call to discuss your ideas - 888.797.6867

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Skiing & Snowboarding 2019

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

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Snowshoeing 2019

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

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Ebbetts Pass Century 2019

The 11th Annual Ebbetts Pass Century is happening August 18th, 2018 with four routes to challenge a variety of cyclists.

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Bear Valley Backcountry Ski Festival coming Winter 2018-2019

Bear Valley Backcountry Ski Festival - Winter 2018-2019 including Freeheel Race

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Upcoming Courses