I've seen a lot of great reviews / recommendations for the Alderson Carthew trail, but nary a mention of the Boundary Trail, which (according to maps) adjoins the A-C in the vicinity of Summit Lake. It seems to me that an Alderson-Carthew-Boundary Loop might be a nice 3-4 day loop, either on its own or as an ambitious add-on to a Northern Traverse or a Belly-Mokowanis-Highline arc (or a Kintla/Bowman-Highline arc).
I'm guessing the Boundary Trail must be in rough shape....
Has anyone here hiked the Boundary Trail?