I think only if watersheds are required to terminate on an ocean, but that does not work for basins that are not connected to the sea, one notable example of wh

I think only if watersheds are required to terminate on an ocean, but that does not work for basins that are not connected to the sea, one notable example of which is not that far south of this point, containing the Great Salt lake. An alternative view (touched on in the article) is that technically, the fork is the end-point of the Atlantic-Pacific divide, and everything upstream on this creek is in a watershed that has one end on one branch downstream of the fork, and the other end on the other branch. In this view, it is the paths downstream of the fork that are not in a watershed. This is not a useful viewpoint, so I agree that this is a corner case in which the tree model does not work.