Congrats on crossing the Arctic Circle, even if you couldn't turn off to celebrate at the official Arctic Circle sign, about nine miles south of your turnaround point.
We ordinarily don't place mid-route waypoints at non-road-intersection points such as river crossings, if there is a road intersection anywhere near. However, in an old (and no longer online) DOT route log, I found a pipeline service road intersecting AK 11 about 0.3 mile south of where you turned around. My local copy of the AK 11 route file now has a PipRd286 point there, which you can plug into your list file once I've pulled it into our system in the next few days when I have more time (on the road right now).