The Denis Julien Inscription was left on a rock face in 1838 (187 years ago) (1838) along the Green River in Moffat County, Colorado by Denis Julien, a French-American trapper who was one of the few Europeans in the area in the 1830s.

Julien made a practice of leaving his mark on locations along the Green and Colorado rivers, leaving at least eight such marks.

[2] Four, including the Colorado mark, are listed on the National Register of Historic Places.

The inscription is located in Whirlpool Canyon in what is now Dinosaur National Monument.

[1] This article about a property in Colorado on the National Register of Historic Places is a stub.