|Elevation||14,265 ft (4,348 m)|
|Location||Colorado, United States|
|Range||Rocky Mountains, Elk Mountains|
|Prominence||2,365 ft (721 m)|
|Topo map||USGS Hayden Peak|
|First ascent||1873 by the Hayden Survey|
Castle Peak is a fourteener in the Elk Mountains of the US state of Colorado. In topography a summit is a point on a surface which is higher in Elevation than all points immediately adjacent to The State of Colorado ( or chiefly by nonresidents) is a state located in the Rocky Mountain region of the United States of America. The United States of America —commonly referred to as the A mountain range is a chain of Mountains bordered by highlands or separated from other mountains by passes or valleys Mountain peaks of the Rocky Mountains The Rocky Mountains, often called the Rockies, are a Mountain range in western North America. The Elk Mountains are a high rugged Mountain range in the Rocky Mountains of western Colorado in the United States. A geographic coordinate system enables every location on the Earth to be specified in three coordinates using mainly a spherical coordinate system. A topographic map is a type of Map characterized by large-scale detail and quantitative representation of relief, usually using Contour lines in modern The United States Geological Survey ( USGS) is a scientific agency of the United States government. In Climbing, a first ascent (FA is the first modern recorded climb to reach the top of a Mountain, or the first to follow a particular Climbing route Dr Ferdinand Vandeveer Hayden ( September 7, 1829 – December 22, 1887) was an American Geologist noted for his pioneering A climbing route is a path by which a climber reaches the top of a Mountain, rock or ice wall Scrambling (also known as alpine scrambling) is a method of ascending rocky faces and ridges Qualification criteria Not all summits over 14000 feet qualify as fourteeners The Elk Mountains are a high rugged Mountain range in the Rocky Mountains of western Colorado in the United States. A US state is any one of the fifty subnational entities of the United States of America that share Sovereignty with the federal government The State of Colorado ( or chiefly by nonresidents) is a state located in the Rocky Mountain region of the United States of America. It is the highest peak in the Elks and the twelfth highest peak in Colorado. The peak rises along the Pitkin-Gunnison county line, approximately 15 miles (24 km) south of Aspen. Pitkin County is one of the 64 counties of the State of Colorado of the United States. Gunnison County is the fifth most extensive of the 64 counties of the State of Colorado of the United States. The City of Aspen is a Home Rule Municipality that is the County seat and the most populous city of Pitkin County, Colorado, United The best climbing months are June, July, August, September through the Montezuma Glacier, a permanent snowfield between Castle and Conundrum Peaks. There are two standard routes for ascent. The Northwest Ridge features a moderate snow climb followed by an easy ridge scramble. It should not be attempted late in the summer, when the 200 ft of loose dirt and scree meet the climber near the top of the Castle-Conundrum saddle. The Northeast Ridge features an easy snow climb, but slightly harder scrambling and route-finding once on the ridge.
Conundrum Peak is a northern subsummit of Castle Peak. It has two closely spaced summits; the northern is higher, with elevation 14,040+ ft (4,279 m).  It is 0. 4 mi (0. 6 km) north of Castle Peak, and has between 200 and 280 feet of topographic prominence. This does not meet the usual 300 foot prominence criterion for an officially separate peak; however it is often climbed in conjunction with Castle Peak. 
In addition, there are two other Castle Peaks in Colorado, one in Eagle County at , elevation 11,240 feet (3,426 m); and the other in Mesa County at , elevation 8,140 feet (2,481 m). Eagle County is the thirteenth most populous of the 64 counties of the State of Colorado in the United States. Mesa County is the fourth most extensive and the eleventh most populous of the 64 counties of the State of Colorado in the United States.
A geographic coordinate system enables every location on the Earth to be specified in three coordinates using mainly a spherical coordinate system.