John Martin, a Calgary native, is an environmental consultant and the author of 13 climbing guides. He has been climbing in the Rockies since 1963 and developing sport routes there since 1983. John lives in Calgary, Alberta.

Jon Jones started rock climbing on the gritstone edges of his native England at the age of 15. Now a recently retired university geology instructor, he spends his time rock climbing in the Rockies, the Okanagan and, when winter arrives, in Australia and other warm places.