He's running north of and parallel to the Trans-Canada heading into Swift Current. Nothing unusual about that.
I'm confused about the rest of what you say, though. Dave hasn't tried a run this long. He has had some success at short multi-day races and some 24-hour races. What is your point?
Dave has done 257. 7 1/2 laps of a standard track. Numbers don’t lie. Now Dave Proctor has scrubbed the route map. He could get lost in a prairie that big.