Uinta Mountains
Range
This view of Kings Peak and the Henry's Fork Basin shows the cliff bands and basins typical throughout the Uintas.
Country	United States
States	Utah, Colorado
Part of	Rocky Mountains
Highest point	Kings Peak
- elevation	13,528 ft (4,123 m)
- coordinates	40°46′34″N 110°22′22″W / 40.776111°N 110.372778°W / 40.776111; -110.372778
Geology	quartzite, shale, and slate
Period	Precambrian

The Uinta Mountains ( /juːˈɪntə/) are a high chain of mountains in northeastern Utah and very slightly into southern Wyoming in the United States. A subrange of the Rocky Mountains, they are unusual for being the highest range in the contiguous United States running east to west,^[1] and lie approximately 100 miles (160 km) east of Salt Lake City. The peaks range in height from 11,000–13,528 feet (3,400–4,123 m), the highest point being Kings Peak, also the highest point in Utah. The Mirror Lake Highway crosses the western half of the Uintas on its way to Wyoming.

Geology[link]

Hayden Peak and Mount Agassiz seen from Bald Mountain.

The rocks in the core of the Uinta Mountains are of Neoproterozoic age^[2] (between about 700 million and 800 million years old) and consist primarily of quartzite, shale, and slate. These rocks comprise the Uinta Mountain Group, and reach thicknesses of 4 to 7.3 kilometres (13,000 to 24,000 ft). Most of the high peaks are in outcrops of the Uinta Mountain Group. Many of the peaks are ringed with bands of cliffs, rising to broad or flat tops.^[3]

The flanks of the east-west trending Uinta Mountains contain a sequence of Paleozoic and Mesozoic strata ranging from the Cambrian Lodore Formation to the Cretaceous Mancos Formation, all of which have been tilted during the uplift of the mountain range.

The uplift of the range dates to the Laramide orogeny, about 70 to 50 million years ago, when compressive forces produced high-angle reverse faults on both north and south sides of the present mountain range. The east-west orientation of the Uintas is anomalous compared to most of the ranges of the northern Rocky Mountains; it may relate to changing stress patterns and rotation of the Colorado Plateau^[4]

The high Uintas were extensively glaciated during the last ice age, and most of the large stream valleys on both the north and south sides of the range held long valley glaciers.^[5] However, despite reaching to over 13,500 feet (4,110 m) in elevation, the climate today is sufficiently dry that no glaciers survived even before the rapid current glacial retreat began in the middle nineteenth century. The Uintas are the most poleward mountain range in the world reaching over 4,000 metres (13,000 ft) without glaciers and are in fact the highest mountain range with no glaciers in the United States. Permafrost occurs at elevations above 10,000 feet (3,000 m)^[6] and at times forms large rock glaciers.

In between the summits and ridgelines are wide, level basins, with some 500 small lakes. One of the most popular lakes is Mirror Lake because of its good fishing and scenic views.

Hydrology[link]

The south and east sides of the range are largely within the Colorado River watershed including Blacks Fork and Duchesne Rivers which are tributaries of the Green River. The Green is a major tributary of the Colorado River and flows in a tight arc around the eastern side of the range.

The Bear and Weber Rivers, the two largest tributaries of Great Salt Lake, are born on the west slope of the range. The Provo River, the largest tributary to Utah Lake, begins on the southern side of the range and flows west to Utah Lake, which itself drains via the Jordan River into Great Salt Lake.

Large portions of the mountain range receive over 40 inches (100 cm) of precipitation annually.^[7] The high Uintas are snowcapped year-round except for late July through early September. The Uinta Mountains have more than 400 miles (640 km) of streams and 1,000 lakes and ponds.^[8]

Ecology[link]

Gilbert Peak seen from lake 151.

The Uinta Mountains are part of the Wasatch and Uinta montane forests ecoregion. Nearly the entire range lies within Wasatch-Cache National Forest (on the north and west) and Ashley National Forest (on the south and east). The highest peaks of the range are protected as part of the High Uintas Wilderness. The forests contain many species of trees, including lodgepole pine, subalpine fir, Engelmann Spruce, Douglas-fir, and Quaking aspen. There are also many species of grasses, shrubs, and forbs growing in the Uinta Mountains.

Points of interest[link]

The Uintas is home to Camp Steiner, the highest boy scout camp in the United States at 10,400 feet (3,200 m). The camp is near mile marker 33 of the Mirror Lake Highway.

The Highline Trail traverses the entire range and is a popular backpacking trail.

Dinosaur National Monument is located on the southeast flank of the Uinta Mountains on the border between Colorado and Utah.

See also[link]

	Geography portal
	North America portal
	United States portal
	Colorado portal
	Utah portal
	Mountains portal

• Outline of Utah
• Index of Utah-related articles
• Geography of Utah
• Geography of Colorado
• Mountain ranges of the world
  • Rocky Mountains
    • Mountain ranges of Colorado
    • Mountain ranges of Utah
• High Uintas Wilderness
• Category:Features of the Uinta Mountains

References[link]

• Davis, Mel, and Veranth, John, High Uinta Trails, Salt Lake City: Wasatch Publishers, 1988 (3rd edition) ISBN 0-915272-37-7
• Hansen, Wallace R. The Geologic Story of the Uinta Mountains, Washington, DC: United States Government Printing Office, 1975

External links[link]

Media related to Uinta Mountains at Wikimedia Commons
Uinta Mountain Lakes Map/Info - an interactive map for exploring the high Uinta lakes

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