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A native to the Front Range of Colorado, Buster Jesik began climbing at age 11. Since then, he has made ascents of rock, ice, and alpine routes in North America, South America, Europe, and Asia. In his personal climbing, Buster has primarily focused on making speed ascents of classic big wall routes in Yosemite, Zion, and the Black Canyon. As an alpinist, he has summited Denali, climbed classic routes in Rocky Mountain National Park, the Canadian Rockies, and the Alps. Buster made the first ascent of an unclimbed 17,000-foot peak in a seldom visited corner of the Indian Himalayas. He was also selected to participate in the first Alpine Mentors Program, started by world-class alpinists to train and mentor the next generation of alpine climbers.

Colorado Mountain School Guide, Buster Jesik, leads a pitch in the Black Canyon of the Gunnison. Buster is an IFMGA / AMGA Certified Mountain Guide.

As a guide, Buster’s loves to teach modern techniques for climbing safely and efficiently. He has experience coaching and training rock climbers who want to maximize their performance and used these skills to lead the Fountain Valley High School climbing team to a state victory. His work has taken him up and down the Front Range of Colorado to the classic ice climbs and backcountry skiing of the San Juan’s, the desert rock of Utah and Nevada, and the world-class alpine climbing of Alaska. Buster’s calm demeanor and expertise are ever present whether it is sharing his enthusiasm for climbing with a beginner or working with an advanced climber looking to up their game.

Buster Jesik is an IFMGA / AMGA Mountain Guide, Wilderness First Responder and AIARE Pro II.


“Highly Recommended Experience”

Awesome guides, Buster Jesik, Sarah Janin, and Tyler Allen took us up Long’s Peak cables route. They couldn’t have been more friendly and knowledgeable. Highly recommended experience. Definitely looking forward to my next trip with CMS and this guide team!

- M.H.

“Very Professional”

I very much enjoyed my recent Classic Ski Tour trip with CMS. Our guide, Buster, was very professional and knowledgable. We skied some fun terrain and I got to push my skills. Definitely worth the time and money!

- Ryan Teter

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