List of National Natural Landmarks in Colorado

From List of National Natural Landmarks, these are the National Natural Landmarks in Colorado. There are 14 in total, 1 of which is shared with Wyoming.

	Name	Image	Date	Location	County	Description
1	Big Spring Creek		02012-10-01October 2012		Saguache	Spring-fed creek in an unconfined aquifer with rare species and plant life
2	Garden of the Gods		01971-01-011971		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.
3	Garden Park Fossil Area		01973-01-011973		Fremont	An internationally known paleontological site.
4	Hanging Lake		02011-06-01June 2011		Garfield	A unique example within the Southern Rocky Mountains biophysiographic province of a lake formed by travertine deposition. It also supports one of the best and largest examples of a hanging garden plant community in the province.
5	Indian Springs Trace Fossil		01979-01-011979		Fremont	Considered the best trace fossil locality in North America for ancient Ordovician animal life.
6	Lost Creek Scenic Area		01966-01-011966		Park, Jefferson	Unusual rock formations and underground stream channels.
7	Morrison-Golden Fossil Areas		01973-01-011973		Jefferson	Site of the first major discovery of giant dinosaur fossils in North America. The site was expanded in 2011 to include the 19-acre Golden Fossil Areas around the city of Golden.
8	Raton Mesa		01963-01-011963		Las Animas	A mesa preserved by a thick lava cap that has resisted destruction from weathering and erosion.
9	Roxborough State Park		01980-01-011980		Douglas	An excellent example of the tilted and faulted sedimentary strata of the Colorado front range.
10	Russell Lakes		01975-01-011975	37°56′41″N 106°07′34″W	Saguache	The most extensive bulrush marsh in Colorado.
11	Sand Creek		01984-01-011984	40°59′49″N 105°46′14″W	Larimer	The most spectacular examples of cross-bedded sandstone and “topple blocks” in North America. NNL area extends across Wyoming border.
12	Slumgullion Earthflow		01965-01-011965	37°59′30″N 107°15′25″W	Hinsdale	An excellent illustration of the geologic process of mass wasting.
13	Spanish Peaks		01976-01-011976		Huerfano, Las Animas	One of the best known examples of exposed igneous dikes.
14	Summit Lake		01965-04-01April 1965	39°35′55″N 105°38′39″W	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.