Hot Springs in Fall River County, South Dakota — The American Midwest (Upper Plains)
Pleistocene Epoch
140,000 years ago
Photographed by William Fischer, Jr., September 25, 2026
1. Pleistocene Epoch Marker
In this final leap through time, you find yourself in the Ice Age. Although colder and drier than today, the Black Hills region was not a frozen wasteland. The massive glaciers characteristic of this time do not reach western South Dakota. Besides the presence of mammoths and other megafauna, most of the plants and animals of the region are still here today.
Head inside and become full immersed in the world of the Ice Age!
Erected by The Mammoth Site of Hot Springs, Inc.
Topics. This historical marker is listed in these topic lists: Animals • Environment • Paleontology.
Location. 43° 25.466′ N, 103° 29.003′ W. Marker is in Hot Springs, South Dakota, in Fall River County. It can be reached from no nearby street. Marker is along the Mammoth Site entrance walkway. Touch for map. Marker is at or near this postal address: 1800 US Highway 18 Bypass, Hot Springs SD 57747, United States of America. Touch for directions.
Regionally, this marker is in West River. It is also in the American Black Hills, in the Lewis & Clark Corridor, on the prairies, and on
this page online
Other nearby markers. At least 8 other markers are within walking distance of this marker: Mid-Cenozoic Era (here, next to this marker); Late Mesozoic Era (a few steps from this marker); Paleozoic-Mesozoic Era (a few steps from this marker); Paleozoic Era (within shouting distance of this marker); Precambrian Era (within shouting distance of this marker); Mammoth Site of Hot Springs, SD (about 600 feet away, measured in a direct line); Woodward Field (approx. 0.4 miles away); Black Hills College (approx. 0.4 miles away). Touch for a list and map of all markers in Hot Springs.
More about this marker. Markers and rocks are part of the walk through Black Hills geology leading to the Mammoth Site.
Related markers. Click here for a list of markers that are related to this marker. Follow the markers chronologically through the geologic timeline
Photographed by William Fischer, Jr., September 25, 2026
2. Pleistocene Epoch Rock and Marker
Credits. This page was last revised on October 24, 2026. It was originally submitted on October 20, 2026, by William Fischer, Jr. of Reynoldsburg, Ohio. This page has been viewed 15 times since then. Photos: 1, 2. submitted on October 20, 2026, by William Fischer, Jr. of Reynoldsburg, Ohio.
