Guardian: It has been called one of North America’s wildest places. Just north of the US-Canada border, the wooded slopes of the Canadian Rockies channel unpolluted water into a valley that remains free of human development. Grizzly bears, cougars and wolverines prowl the banks of the Flathead river. Outside of a national park, there is probably no wilderness like it on the continent. But outside of a national park could mean outside of legal protection. Somewhere in the workings of the British …