recognizes a cultural association between the monument and the following present nations: Iowa Tribe of Kansas and Nebraska Iowa Tribe of Oklahoma Otoe–Missouria Tribe of Indians Ho-Chunk Nation of Wisconsin Winnebago Tribe of Nebraska Upper Sioux Community of Minnesota Shakopee Mdewakanton Sioux Community In the State of Minnesota Lower Sioux Indian Community of Mdewakanton Sioux Indians of Minnesota Prairie Island Indian Community In the State of Minnesota Sac and Fox Tribe of the Mississippi in Iowa Sac and Fox Nation of Missouri in Kansas and Nebraska Sac and Fox Nation of Oklahoma Crow Creek Sioux of South Dakota Omaha Tribe of Nebraska Santee Sioux Nation of Nebraska Standing Rock Sioux Tribe of North Dakota Yankton Sioux Tribe of South Dakota Sisseton Wahpeton Oyate Flandreau Santee Sioux Tribe Ponca Tribe of Nebraska Public access The visitor center, located at the park entrance, contains museum exhibits highlighting archaeological and natural specimens, an auditorium, and book sales outlet. The park has 14 miles of hiking trails. No paved public automobile access roads exist in the park. Rangers give guided hikes and prehistoric tool demonstrations that are scheduled and advertised, mid-June through Labor Day weekend. Educational programs are presented on- and off-site by appointment. Natural features in the monument include forests, tallgrass prairies, wetlands and rivers. There are no lodging or camping facilities in the park. Excellent camping is available at nearby Pikes Peak State Park and Yellow River State Forest in Iowa; there is also Wyalusing State Park in Wisconsin. Various primitive campgrounds exist in the area as well. The national monument is quite close to the town of Marquette, Iowa, and is just across the Mississippi River from the city of Prairie du Chien, Wisconsin, where ample motel and gambling-boat facilities exist. Effigy Mounds was proclaimed a National Monument on October 25, 1949. Charles R. Keyes, head of the Iowa Archaeological Survey, and Ellison Orr, chief field supervisor for the Iowa Archaeological Survey, worked to survey and map the area, and to establish its significance for preservation. Driftless Area The Effigy Mounds National Monument is noted for being in the Driftless Area, an area of North America which escaped glaciation during the last ice age. The adjacent Driftless Area National Wildlife Refuge takes its name from this region. The Park Service writes: Patchy remnants of Pre-Illinoian glacial drift more than 500,000 years old recently have been discovered in the area. Unlike the