Purgatoire River track site, Paleontological site in La Junta, Colorado, US
The Purgatoire River track site contains over 1500 individual dinosaur footprints preserved in limestone along a quarter-mile stretch of bedrock.
The Morrison Formation at this location dates back 150 million years, revealing tracks made by Allosaurus, Apatosaurus, Diplodocus, and Stegosaurus near an ancient lakeshore.
The name evolved from Spanish to French, with European settlers eventually adapting Purgatoire to Picketwire, reflecting the multicultural heritage of the region.
Visitors need to complete an 11-mile round trip hike with 610 feet elevation change to reach the tracksite within Comanche National Grassland.
Research in 2014 uncovered 90 new trackways demonstrating group behavior patterns of sauropods, indicating these massive herbivores traveled in mixed-age herds.
Location: Colorado
GPS coordinates: 37.61680,-103.59800
Latest update: March 30, 2025 00:30
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