I am considering a hike along the Canadian Great Divide Trail from Jasper southward. As described in Dustin Lynx' book Hiking Canada's Great Divide Trail, the middle segment inside Jasper National Park passes through the upper reaches of the Maligne River valley over the Maligne Pass. However, this trail is no (longer) listed in the Backcountry Guide(PDF, 5 MB), nor are its campgrounds, and it has apparently been decommisioned.
Considering that one may only camp on designated backcountry campsites and that it's 42 km from the (former) Maligne Valley trailhead to the next designated campground on the Brazeau loop, is it permitted to hike this former trail and camp on one of its five former campgrounds? Strictly speaking I would think no, but this tripadvisor post states that one can still hike and camp there. What is the official rule?
It would be very difficult to hike this segment of the Great Divide Trail if it is no longer permitted to hike here.
Of course, I fully expect that hiking here would be significantly slower than in the past.