The following table ranks the 50 highest United States counties or county-equivalents [lower-alpha 1] by mean elevation. [lower-alpha 2] This list uses the "mean of extremes" elevation which is the arithmetic mean of the highest and lowest elevations.
Lake County, Colorado has the highest U.S. county mean elevation of 11,702 feet (3,567 m). Lake County is the home of Mount Elbert and Mount Massive, the two highest summits of the Rocky Mountains of the United States and Canada. Lake County is also the home of the highest U.S. county low point, the Arkansas River at the Chaffee County line with an elevation of 8,965 feet (2,733 m).
With the highest mountain of all North America, the Denali Borough of Alaska has both the highest U.S. county high point, the summit of Denali at 20,310 feet (6,190.5 m) elevation, and the greatest U.S. county elevation range of 19,925 feet (6,073 m).
Of these 50 highest U.S. counties, 34 counties are located in Colorado, four counties in Wyoming, four counties in New Mexico, three counties in Utah, two boroughs in Alaska, and one county each in California, Idaho, and Nevada.
Mount Bailey is a mountain summit in the Front Range of the Rocky Mountains of North America. The 9,089-foot (2,770 m) peak is located 1.0 mile (1.6 km) northeast of the community of Bailey in Park County, Colorado, United States.
Mount Oxford is a high mountain summit of the Collegiate Peaks in the Sawatch Range of the Rocky Mountains of North America. The 14,160-foot (4,316 m) fourteener is located in the Collegiate Peaks Wilderness of San Isabel National Forest, 14.2 miles (22.9 km) northwest of the Town of Buena Vista in Chaffee County, Colorado, United States. The mountain was named in honor of the University of Oxford.
Mount Lamborn is a mountain summit in the West Elk Mountains range of the Rocky Mountains of North America. The 11,402-foot (3,475 m) peak is located in Gunnison National Forest, 5.9 miles (9.5 km) southeast by south of the Town of Paonia in Delta County, Colorado, United States. The summit of Mount Lamborn is the highest point in Delta County. Together with nearby Landsend Peak to the southwest, it lies at the western edge of the West Elks, rising dramatically nearly 6,000 ft above the valley of the North Fork Gunnison River to the west.
Mount Lola is a mountain in the Sierra Nevada of California. Its summit, located north of Donner Pass and Interstate 80, is the highest point in Nevada County. It is also the highest point in the Sierra Nevada north of Interstate 80. A subsidiary peak 1.2 miles (1.9 km) north of the main summit is highest point in Sierra County at 8,848 feet (2,697 m) NAVD 88.
Conejos Peak is a high and prominent mountain summit in the southern San Juan Mountains of the Rocky Mountains of North America. The 13,179-foot (4,017 m) thirteener is located in the South San Juan Wilderness of Rio Grande National Forest, 19.6 miles (31.6 km) north-northwest of Cumbres Pass in Conejos County, Colorado, United States. The summit of Conejos Peak is the highest point in Conejos County.
For the mountain in California formerly named Summit Peak, see Mount Ina Coolbrith.
South Bald Mountain is the highest summit of the Laramie Mountains in the Rocky Mountains of North America. The summit in Roosevelt National Forest southwest of Red Feather Lakes is the highest of five peaks forming Bald Mountain.
Mount Jackson is a high and prominent mountain summit in the northern Sawatch Range of the Rocky Mountains of North America. The 13,676-foot (4,168 m) thirteener is located in the Holy Cross Wilderness of White River National Forest, 9.0 miles (14.5 km) west-southwest of the Town of Minturn in Eagle County, Colorado, United States. The mountain was named in honor of photographer William Henry Jackson, who accompanied the Hayden Survey in the 1870s.
Zenobia Peak, elevation 9,022 ft (2,750 m), is the highest summit in Dinosaur National Monument of Moffat County, Colorado.
Mount Guero is a prominent mountain summit in the West Elk Mountains range of the Rocky Mountains of North America. The 12,058-foot (3,675 m) peak is located in the West Elk Wilderness of the Gunnison National Forest, 13 miles (21 km) east of Crawford, Colorado in Delta County and 24.3 miles (39.1 km) west-southwest of the Town of Crested Butte in Gunnison County, Colorado, United States.
Bushnell Peak is a prominent mountain summit in the Sangre de Cristo Range of the Rocky Mountains of North America. The 13,110-foot (3,996 m) thirteener is located 7.2 miles (11.6 km) north-northeast of the community of Villa Grove, Colorado, United States, on the drainage divide separating Rio Grande National Forest and Saguache County from San Isabel National Forest and Fremont County. Bushnell Peak is the highest point in Fremont County.
Green Mountain is a mesa on the eastern flank of the Front Range of the Rocky Mountains of North America. The 6,854-foot (2,089 m) mesa summit is located in William Frederick Hayden Park in the City of Lakewood, Colorado, United States, 4.0 miles (6.5 km) west of the municipal center of Lakewood in Jefferson County.
Mount Morrison is a foothill on the eastern flank of the Front Range of the Rocky Mountains of North America. The 7,881-foot (2,402 m) peak is located in Red Rocks Park, 1.9 miles (3.0 km) northwest by west of the Town of Morrison in Jefferson County, Colorado, United States. Red Rocks Amphitheatre is located on the eastern side of the mountain.
Horsefly Peak is the highest summit of the Uncompahgre Plateau in the Rocky Mountains of North America. The 10,353-foot (3,156 m) peak is located 10.0 miles (16.1 km) west by north of the Town of Ridgway in Ouray County, Colorado, United States.
Mount Owen is the highest summit of the Ruby Range of the Rocky Mountains of North America. The 13,070-foot (3,984 m) thirteener is located in Gunnison National Forest at the edge of the Raggeds Wilderness, 8.5 miles (13.6 km) west-northwest of the Town of Crested Butte in Gunnison County, Colorado, United States.
Mount Emmons is a mountain summit in the Elk Mountains range of the Rocky Mountains in north-central Gunnison County, Colorado, United States.
Hahns Peak is a summit in Routt County, Colorado, in the United States. With an elevation of 10,774 feet (3,284 m), Hahns Peak is the 1855th highest summit in the state of Colorado.