• Camarasus skull in the cliff face, rafters on the Green River, McKee Springs petroglyphs


    National Monument CO,UT

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Press Kit

Entrance to Lodore Canyon
Gates of Lodore
NPS Photo

Dinosaur National Monument was established on October 4, 1915, as an 80-acre monument to preserve the outstanding fossil resources at the dinosaur quarry north of Jensen, Utah. In 1938 the monument was enlarged to 203,885 acres. This proclamation vastly expanded the land base to include the river corridors and adjacent viewsheds for the major canyons of the Green and Yampa Rivers. On September 8, 1960 minor revisions to the boundary enlarged the monument to 211,141.69 acres, for the construction of entrance roads and administrative sites.

Dinosaur Significance
Visitor Statistics
Quarry Visitor Center Background

Did You Know?

Photo of tilted rock layers at sunrise.

Dinosaur National Monument's geology is a feast for the mind and the eye. The rock layers, which have been tilted by folding, expose a variety of colors and textures.