El Jebel, Colorado

The Tenmile Range is a mountain range in U.S. state of Colorado. The range is an extension of the Mosquito Range which is part of the Rocky Mountains. The two ranges are effectively the same range. They are split only by the Continental Divide and name. The Tenmile Range is on the north side of the divide, and the Mosquito on the south. The range is often referred to as the Tenmile-Mosquito Range. There are more than a dozen peaks in the range. Peak 1 is the northernmost peak. The sub-peaks of Mt. Victoria and Mt. Royal are located north of Peak 1. Tenmile Peak, south of Peak 1, is also known as Peak 2. Quandary Peak is the southernmost peak and highest point in the Range, elevation 14,271 feet.The range is famous for its skiing, both backcountry and resort areas. Breckenridge Ski Resort is in the range. The Tenmile Range includes Pacific Tarn, believed to be the highest named lake in the United States. Approximately 25,000 acres (100 km2) of the Tenmile Range is protected in the Camp Hale – Continental Divide National Monument.

Quandary Peak is the highest summit of the Tenmile Range in the Rocky Mountains of North America and is the most commonly climbed fourteener in Colorado. It has nearly the same elevation as Castle Peak and Mount Blue Sky. It lies in Summit County and within the White River National Forest about 6 miles (10 km) south-southwest of the town of Breckenridge. The standard route up Quandary Peak is a trail hike (class 1), starting from a trailhead about 1 mile (1.6 km) north of Hoosier Pass on the east side of the peak. Hence it is a popular fourteener to climb because of the relatively easy ascent and its proximity to Denver and Breckenridge. Quandary Peak is also popular with backcountry skiers and snowboarders. The gentle ascent makes for an easy climb from the east with less danger from avalanche than on many other fourteeners. The other slopes of the peak are steep and appeal to expert backcountry skiers. One such steep ski mountaineering route is the Cristo Couloir. In June 2021 the Colorado Fourteeners Initiative announced that Quandary Peak was Colorado's most popular 14'er in 2020. The Initiative's data indicated that the peak saw 49,179 hiker days in 2020. Its popularity in recent years has caused serious parking problems at the trailheads, prompting local officials to initiate new parking policies.

Cristo Couloir, Quandary Peak, is a 2,575 feet (785 m) couloir located on Quandary Peak that stretches from just above the Blue Lakes Dam to the summit at 14,265 feet (4,348 m). It is a popular ski mountaineering descent in the spring climbing season (April through June, depending on weather and snow conditions). The ascent can be accomplished by an experienced mountaineer in 3–5 hours and the ski descent in 1–2 hours. Cristo Couloir is actually closer to one mile in length with elevation gain of over 2,000 ft . The ascent from the base parking lot below the dam is about a mile and 1/2 with a total elevation gain of approximately 2,500 ft.

Pacific Tarn is a small lake located in the Colorado Rocky Mountains in the United States. It is notable for its 13,420 foot (4,090 m) elevation, making it the highest lake in the United States whose name is recognized by the United States Board on Geographic Names, surpassing other lakes such as Hawaii's Lake Waiau on Mauna Kea, and California's Tulainyo Lake near Mount Whitney. The lake sits atop the broad eastern ridge of Pacific Peak in the Tenmile Range. Efforts to name the lake were spearheaded by Carl Drews, a Boulder, Colorado resident who organized an expedition to the lake in 2002 to measure the size, depth and water chemistry. The lake remained unnamed until January 8, 2004, when the United States Board of Geographic Names officially approved the name Pacific Tarn for the lake.

North Star Mountain is a 13,614-foot (4,150 m) mountain summit on the shared border of Park County and Summit County, in Colorado, United States.

Atlantic Peak, elevation 13,835 ft (4,217 m), is a summit in the Tenmile Range of central Colorado. The peak is southwest of Breckenridge in the Arapaho National Forest. Its summit is visible close by to the northwest from the summit of Quandary Peak, a popular 14er in Colorado. It is often hiked together with nearby Pacific Peak.

Pacific Peak, elevation 13,957 ft (4,254 m), is a summit in the Mosquito Range of central Colorado. The peak is southwest of Breckenridge in the Arapaho National Forest. Its long east ridge is prominently visible across the valley to the north when hiking Quandary Peak, a popular 14er in Colorado. It is often hiked together with nearby Atlantic Peak. Pacific Tarn, the highest officially named lake in the United States, lies high on the eastern flank of the peak.

Fletcher Mountain is a high mountain summit in the Tenmile Range of the Rocky Mountains of North America. The 13,958-foot (4,254 m) thirteener is located in Arapaho National Forest, 8.1 miles (13.0 km) southwest by south (bearing 215°) of the Town of Breckenridge in Summit County, Colorado, United States.

Crystal Peak is a high mountain summit in the Tenmile Range of the Rocky Mountains of North America. The 13,859-foot (4,224 m) thirteener is in White River National Forest, 5.9 miles (9.5 km) southwest (bearing 220°) of the Town of Breckenridge in Summit County, Colorado, United States.

Peak 10, elevation 13,640 ft (4,157 m), is a summit in the Tenmile Range of central Colorado. The peak is southwest of Breckenridge in the Arapaho National Forest. The lowest part of Peak 10 is serviced by Breckenridge Ski Resort's Falcon SuperChair.

Wheeler Mountain is a 13,690-foot (4,173 m) summit in Summit County, Colorado, United States.

Montgomery Reservoir lies high in Colorado's Mosquito Range near Hoosier Pass a few miles north of Alma, Colorado. The reservoir sits at an altitude of 10,873 feet (3,314 meters). It is owned by Colorado Springs Utilities and delivers water to Colorado Springs, Colorado for municipal use. Built in 1957, the reservoir stores water from the Middle Fork South Platte River and from a tunnel that brings water from the Blue River on the west side of the continental divide.