Oklahoma Boomers: Santa Fe Railroad is a mini-expansion for Oklahoma Boomers, that adds railroad tracks to the game. The railroad tracks are placed on the board at the beginning of the game so that they connect two sides of the board. If at the end of the game, a homestead is divided by the railroad tracks into two or more sections, then the player can only score one of these sections. However, of two or more boomers share a homestead divided by railroad tracks, then more sections can e scored. The mini-expansion contains 15 black railroad tracks.