Purgatoire River track site

[1] The site is located on public land of the Comanche National Grassland, along the Purgatoire ("Picketwire") River south of La Junta in Otero County, Colorado.

[2] The tracksite is far from paved roads, but accessible to the public by hiking on foot, by mountain bike, or by horseback.

As a result, researchers in 2012 proposed a "major revision of lower Mesozoic stratigraphy in the Picket Wire Canyonlands" and a "critical reappraisal of understanding of the correlation of Triassic strata from Wyoming, through and under the Denver Basin, to the High Plains of Oklahoma and New Mexico.

The site formed along the shore of a large freshwater lake at the time the tracks were made.

A previously unmapped region was discovered in 2012, where removal of alluvium revealed 90 new trackways, showing parallel prints.