In this case, it's actually 3000km on Highway 1, that's it, the main highway in Canada and pretty much the only real highway to get anywhere across Saskatchewan to South Western Ontario.

They would have no reason to leave this highway unless maybe they wanted to take the shorter route through the states, but I have no clue how they could have ended up where they were in the middle of nowhere not even on a road. Glad they were ok, but jeez, common sense or look at a map at least once.