Dry Mesa Quarry

Dry Mesa Quarry is a paleontological excavation site in Uncompahgre National Forest that holds numerous dinosaur fossils within a thick sandstone layer. The fossils are embedded in the Morrison Formation and provide insights into the Upper Jurassic period.

Excavation work began in 1972 under James Jensen from Brigham Young University after Daniel and Vivian Jones discovered a large theropod bone in 1971. This initial significant discovery led to decades of scientific investigation.

The site generated a documentary film named The Great Dinosaur Discovery in 1973, which later aired on television channels across the United States.

Access to the site requires a four-wheel drive vehicle, especially during warmer months, as road conditions remain challenging throughout the year. Visitors should prepare for rough terrain and extended travel times.

The site holds an unusually diverse collection of 30 vertebrate genera from the Jurassic time. This variety makes it a rare window into the ancient ecosystem of this region.

Location: Colorado

GPS coordinates: 38.56742,-108.38360

Latest update: December 12, 2025 14:25