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The Waco Mammoth National Monument is a museum and paleontological site in Waco, Texas, the U.S.A., that has discovered 24 Colombian mammoths and other mammals of the Pleistocene period.

The monument is situated in a wooded area of 100 acres near the Bosque River. It is suspected that the flash-flooded deaths of the unrevealed extinct mammals, drowning the creatures around 67,000 years ago, were a result of the near proximation to the river. The rodents and many other mammals of the period were further cementing soil degradation into the earth's depths.

The site is a recurring occurrence suspected to be flash flooding at the highest concentration of mammoths.

Not all of the mammoths on-site died simultaneously, but in three separate cases in the same area. Since the initial bone was found, a local relationship was formed around the site.

 The City of Waco and the University of Baylor collaborated with the Waco Mammoth Foundation to build the site. Baylor's participation consisted primarily of research, restoration, and storage of resources from the site, while Waco's town helped preserve the property. They actively pursued the National Monument's designation in 2015 to put into the relationship the National Park Service expertise. 10,000-1 million years ago, Colombian mammoths existed. They moved to North America and Nicaragua to the south.

A diet consisting of numerous species, ranging from grasses to conifers, was a herbivorous Colombian mammoth. At the time, central Texas's ecosystem was made up of moderate grasslands and Savannahs flanked by river flats.

 The location was identified in 1978 in the Forest River area by Paul Barron and Eddie Bufkin looking for arrowheads and fossils. The men discovered a large bone and carried it to the Baylor University Strecker Museum for study. The Museum staff arrange a systematic excavation on site between 1978 and 1990 after the bone was identified as a Colombian mammoth. Sr. George F. Naryshkin (then a bachelor of architecture at Baylor) started to practice and research for 2.5 years in 1979.