Breadcrumb Home Madison Range Madison Range By the editors Located in the Rocky Mountains, the Madison Range was named by Meriwether Lewis after then future-president James Madison, and lies in the westernmost section of the Greater Yellowstone Ecosystem. 45.250784052047, -111.44360355322 Tags Mountains Madison Range Related Culture: Around the Bozone Bag of Peaks Nature Upside-Down Air Culture: The New West Our Wild Back Yard