Slim Buttes National Forest

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Slim Buttes National Forest was established by the United States General Land Office as Slim Buttes Forest Reserve in South Dakota on March 5, 1904 with {{convert|58160|acre|km2}}. After the transfer of federal forests to the U.S. Forest Service in 1905, it became a National Forest on March 4, 1907. On July 1, 1908 it was absorbed by Sioux National Forest and the name was discontinued.{{Cite web|title=National Forests of the United States|url=http://www.foresthistory.org/ASPNET/places/National%20Forests%20of%20the%20U.S.pdf|date=September 29, 2005|author=Davis, Richard C.|publisher=The Forest History Society|url-status=dead|archive-url=https://web.archive.org/web/20121028014355/http://www.foresthistory.org/ASPNET/Places/National%20Forests%20of%20the%20U.S.pdf|archive-date=October 28, 2012}}

The forest today comprises the Slim Buttes unit of the Sioux Ranger District of Custer National Forest, southeast of Buffalo.{{cite web|url=http://www.fs.fed.us/r1/custer/recreation/D3.shtml|date=2008-08-23|work=Custer National Forest|title=Sioux Ranger District|publisher=U.S. Forest Service}}

Points of interest include the Reva Gap Campground along HWY 20, The Castles National Natural Landmark adjacent to the campground and the old Jesse Elliott Ranger Station.