An epic story of the Western Rocky Mountains, with the setting of Gateway (actually Canmore). The story covers 100 years, from 1911 with guides taking pack-horse expeditions into the mountains. The core story is the disappearance of an American fossil-hunting expedition. The history of Canadian National Parks is presented as an evocative back story. This is a very good read, capturing the romance (literal and figurative) of mountains and the men and women who blazed the trails.