Location: Rio Blanco County
Size: 4980 acres
Land Manager: Bureau of Land Management
Raven Ridge is an exposure of the Evacuation Creek member of the Green River Formation. The site provides habitat for eight endemic plant species: Penstemon grahamii (Graham beardtongue), Penstemon albifluvis (White River beardtongue), Astragalus lutosus (Dragon milkvetch), Aquilegia barnebyi (Mancos columbine), Cryptantha rollinsii (Rollin's catseye), Parthenium ligulata (Colorado feverfew), Eriogonum ephedroides (ephedra buckwheat), and Phacelia incana (hoary phacelia). Raven Ridge is unique in Colorado for its diverse rare plant assemblage. In addition, the shales contain one of the richest North American assemblages of insect fossils from the Eocene Period (approximately 37-57 million years before the present).
Please be aware that this site contains features of state-wide significance. Collection is prohibited at all times with out proper permits.