It's no secret that I've nurtured a love affair with the rivers of the Far North . What captured me, decades ago, and what still holds me, is the potential to drop in from a bridge crossing, a railroad stop, or a bush plane and truly disappear into the wilds for weeks on end. Rarely encountering people, seeing few signs of civilization, just being there week after week without distraction. I've argued that nothing south of the border compares, and I still believe that. There are inevitable nearby roads, cabins, towns, bridge crossings, fishing access, parks. The remote corridors simply don't cover enough ground. It is really tough to dive in and stay gone in that sweet way you can in, say, Labrador or northern Manitoba , never mind Nunavut . That said, there are a handful of routes in the continental U.S. that come close. Places you can escape,...