CMH Heli-Skiing & Summer Adventures | 5,102 followers on LinkedIn. ABOUT CMH HELI-SKIING & SUMMER ADVENTURES: Celebrating 60 years of heli-adventures, CMH Heli-Skiing & Summer Adventures is the world’s first and largest heli-skiing and heli-hiking operator. From their head office in Banff, Alberta, CMH operates exceptional mountain experiences based from 11 lodges located in the Bugaboo, Purcell, Selkirk, Monashee, and Cariboo ranges of British Columbia, Canada. Heli-skiing takes place each year from December through April, and CMH Summer Adventures take place from July to mid-September.