Rager Reservoir is a small body of water located in the eastern Madeline Plains (Section 24, T. 36 N. R. 15E). It was built in the early 1900s by Thomas Rager, a resident of the Madeline Plains. A native of Illinois, Rager first came to the region in 1879 working as a cowboy for the Smoke Creek Ranch. By the 1890s, he set out of his own on the Madeline Plains where the lived the rest of his life and passed away in 1925.