J.C.H. Grabill image circa 1891 showing rocks at, according to the caption on front, "Lake Harney Peaks." These rocks now emerge from Sylvan Lake, formed by a dam at one end of a valley in the Needles Area of Custer State Park. Historic image courtesy Library of Congress. ©Paul Horsted, All Rights Reserved.
J.C.H. Grabill image circa 1891 showing rocks at, according to the caption on front, "Lake Harney Peaks." These rocks now emerge from Sylvan Lake, formed by a dam at one end of a valley in the Needles Area of Custer State Park. Historic image courtesy Library of Congress. ©Paul Horsted, All Rights Reserved.
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