Hell Gap complex is a Plano culture

Plano cultures

The Plano cultures is a name given by archaeologists to a group of disparate hunter-gatherer communities that occupied the Great Plains area of North America during the Paleo-Indian period in the United States and the Paleo-Indian or Archaic period in Canada....

 from 10,060 to 9,600 before present that is named after the archaeological site

Archaeological site

An archaeological site is a place in which evidence of past activity is preserved , and which has been, or may be, investigated using the discipline of archaeology and represents a part of the archaeological record.Beyond this, the definition and geographical extent of a 'site' can vary widely,...

 in Hell Gap, Wyoming. Hell Gap points are long stemmed, convex blades.

In addition to the Hell Gap site, other Wyoming sites include the Sister's Hill site in northeastern Wyoming and a bison kill site near Caspar, Wyoming. Jones-Miller Bison Kill Site

Jones-Miller Bison Kill Site

The Jones-Miller Bison Kill Site, located in northeast Colorado, was a Paleo-Indian site where Bison antiquus were killed and butchered. Hell Gap complex bones and tools artifacts at the site are carbon dated from about ca. 8000-8050 BC.-Geography:...

is the only Hell Gap complex site in Colorado.