List of National Natural Landmarks in Colorado

From List of National Natural Landmarks, these are the National Natural Landmarks in Colorado. There are 12 in total, 1 is shared with Wyoming.

Name Image Date Location County Description
1 Lost Creek Scenic Area 01966 1966 Park, Jefferson Unusual rock formations and underground stream channels.
2 Garden Park Fossil Area 01973 1973 Fremont An internationally known paleontological site.
3 Indian Springs Trace Fossil 01979 1979 Fremont Considered the best trace fossil locality in North America for ancient Ordovician animal life.
4 Morrison Fossil Area 01973 1973 Jefferson Site of the first major discovery of giant dinosaur fossils in North America.
5 Raton Mesa 01963 1963 Las Animas A mesa preserved by a thick lava cap that has resisted destruction from weathering and erosion.
6 Roxborough State Park 01980 1980 Douglas An excellent example of the tilted and faulted sedimentary strata of the Colorado front range.
7 Russell Lakes 01975 1975 Saguache The most extensive bulrush marsh in Colorado.
8 Slumgullion Earthflow 01965 1965 Hinsdale An excellent illustration of the geologic process of mass wasting.
9 Spanish Peaks 01976 1976 Huerfano, Las Animas One of the best known examples of exposed igneous dikes.
10 Summit Lake 01965-04 April 1965 Clear Creek A 160 acres (0.65 km²) park which contains alpine tundra around a small alpine lake. Some of the plants that survive in this microclimate are usually found only in the Arctic Circle.
11 Garden of the Gods 01971 1971 El Paso An outstanding illustration of the lithologic character of sedimentary rocks, and of the vertical forces that produced the front range of the Rocky Mountains.
12 Sand Creek 01984 1984 Larimer The most spectacular examples of cross-bedded sandstone and “topple blocks” in North America. NNL area extends across Wyoming border.