Dinosaur National Monument Visitation Statistics
- Year to Date Reports
- Monthly Public Use Reports
- Annual Monument Visitation (all years)
- Visitation by Month/ Year
- Monument Fiscal Year Report
- How We Count
- Visitation Comments by Monument Staff
This information is available on the NPS Stats Website.
Important Dates
- August 17, 1909 - Earl Douglass, Carnegie Museum paleontologist, discovers eight vertebra of an Apatosaurus, the first skeleton discovered and excavated at the Dinosaur Quarry
- October 4, 1915 - President Woodrow Wilson signs presidential proclamation establishing 80 acres surrounding the Dinosaur Quarry as Dinosaur National Monument
- July 14, 1938 - President Franklin D. Roosevelt signs Presidential proclamation expanding monument by approximately 200,000 acres to include the canyons of the Green and Yampa rivers
- June 1, 1958 - Dinosaur Quarry Visitor Center is dedicated and opened to the public
- September 8, 1960 - Congress adjusts and affirms Dinosaur National Monument's boundaries, giving the monument additional statutory protection beyond that afforded by the 1915 and 1938 presidential proclamations
- 1965 - Monument Headquarters Visitor Center and Harpers Corner tour road are dedicated and opened to the public
- December 4, 1974 – President Gerald Ford recommends to Congress that 165,341 acres of Dinosaur National Monument be added to the National Wilderness Preservation System
- May 11, 1978 – An enlarged wilderness recommendation for 205,672 acres is sent to Congress, and becomes Dinosaur’s official Recommended Wilderness
- October 4, 2011 - The Quarry Exhibit Hall and Quarry Visitor Center are reopened after a 5½ year closure.
Geographic Facts
- Total Acreage: 210281.92 acres or 328.57 square miles (850.98 square kilometers)
- Wilderness: Today, over 91 percent of Dinosaur National Monument is administered as Recommended Wilderness
- Highest elevation: 9,006 feet (2,745 meters) at Zenobia Peak
- Lowest elevation: 4,740 feet (1,444.75 meters) along Green River in the southwest corner of the monument
- Elevation at Dinosaur Quarry: 5,000 feet (1,524 meters)
- Elevation at Monument Headquarters: 5,900 feet (1,798.32 meters)
- Highest point on Harpers Corner Road: 7,560 feet (2304.29 meters) at Stuntz Ridge
- Deepest canyon: Canyon of Lodore, over 3,000 feet (914.4 meters) deep from rim to the river in several places
- Highest cliff: Warm Springs cliff, 1,500 feet (457.2 meters)
- Yampa River in the monument is 46 miles (74.03 kilometers) long from Deerlodge Park to its confluence with the Green River
- Green River in the monument is 45 miles (72.42 kilometers) long from Gates of Lodore to Split Mountain Boat Ramp
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