First Congregational Church of Keystone will serve the 100th Annual Buffalo Dinner 11:30-1:30pm. The first dinner was served in 1925; an elk was harvest by Gutzon Borglum from Custer State Park and served at the Mt Rushmore dedication. Over time, the menu evolved to bison which the church currently serves today. Take part in a long tradition by dining at the church or order a take-out meal by calling 605-666-4627.