Skiing and climbing adventures in Canada and around the world led by Mark Klassen, an experienced Mountain Guide certified by the Association of Canadian Mountain Guides and the International Federation of Mountain Guiding Associations. The local expert for AST avalanche courses, ski touring, rock climbing and mountaineering in Banff, Lake Louise, Jasper, the Bugaboos, Rogers Pass and powder ski guiding in Japan.

Skiing in Hakuba, Japan

Japow! Spaces available January 2020

Snowing hard at Motoi Lodge!

Sushi night

We still have space on our Japow Hakuba trip! Amazing powder skiing in beautiful forest, a comfortable lodge tucked away in the trees, unbelievable food!

AST Courses Banff & Rogers Pass

Learning route finding skills

Extended Column Test

Gain confidence in your decisions!

Avalanche courses with experienced instructors. Learn about snowpack, terrain and decision making.

Skiing and climbing guiding


Deep powder skiing! Come with me to the backcountry of Japan and British Columbia, traverse the Wapta Icefield, or take an avalanche course.

Let's Go →


Guided ascents of classic Canadian peaks! Climb famous mountains like Louis, Victoria, Athabasca, Robson, Bugaboo, and Sir Donald with an experienced ACMG guide. 

Get Started →


Rock climbing in Banff, Lake Louise and Canmore. Sport climbing, multipitch, and alpine rock. Climbing guides for Yamnuska, Back of the Lake, the Bugaboos, and more!

Climb On →

Mark has always been confident, safety oriented and extremely knowledgeable concerning all aspects of the climb. He has a real passion for his profession and is proud of being a world class certified guide.
— Grant, Denver