Photographic print: copy of a Black and white photograph of a five-sided stone building partially built into the side of a hill. A gable-roffed structure with wrap-around porch is located slightly above and to the left of the blockhouse. A river is visible in the background to the right of the blockhouse. Trees indicate the river's opposite bank. A field with roads/trails is in the foreground with two men standing down the hill. "Old blockhouse, / Fort Snelling" handwritten in pencil on reverse.