You beat a team you win the land from the team you beat. Week 1 wins started it all. We beat Wyoming so we occupied every county closest to Wyoming university.
Looks like we'll have Lake Michigan to the NE Nevada border if we pull off a win Saturday. If we then beat USC in the Holiday Bowl, we would pretty much have the Lewis and Clark Oregon trail to ourselves.
As of today, our only opportunity is to grab Wisconsin's territory, Purdue has no land and Neb has no land, and the teams they play before us have no land. Wisconsin is our last chance to grab land in the regular season.