Mule Ear Peaks are two summits in Brewster County, Texas, United States.
Description Mule Ear Peaks is part of the Chisos Mountains and is set in the Chihuahuan Desert where it is an iconic landmark in Big Bend National Park. The south peak reaches 3,897 feet in elevation (1,188 meters) and the north peak is . The landform is a dike composed of rhyolite (volcanic rock) which formed 29 million years ago during the Oligocene period, specifically the Burro Mesa Rhyolite member of the Burro Mesa Formation.Gray, J.E., Geological, Geochemical, and Geophysical Studies by the U.S. Geological Survey in Big Bend National Park, Texas, U.S. Geological Survey Circular 1327, p. 35, Retrieved 2024-11-08. Below the spires are Mule Ear Spring Tuff and Bee Mountain Basalt.Crouching Mule - Hidden Canyon: A Trip Down the Maxwell Scenic Highway, Francis Redfern, Retrieved 2024-11-08. Based on the Köppen climate classification, the peaks are located in a hot arid climate zone with hot summers and mild winters. Any scant precipitation runoff from the peak's slopes drains into Smoky Creek which empties into the Rio Grande six miles to the south-southwest. Topographic relief is significant as the summit rises 1,080 feet (329 m) above Smoky Creek in 0.35 mile (0.56 km). The mountain's descriptive toponym has been officially adopted by the United States Board on Geographic Names, and has been featured in publications since at least 1907.A Sketch of the Geology of the Chisos Country, Brewster County, Texas, Johan August Udden, University of Texas, 1907, p. 65 In the 1930s, part of Army Air Corps flight training included flying between these two spires.Big Bend National Park (N.P.), General Management Plan, United States National Park Service, 2004, p. 110.The Big Bend of the Rio Grande: A Guide to the Rocks, Geologic History, and Settlers of the Area of Big Bend National Park, Texas Bureau of Economic Geology, NPS.gov, Retrieved 2024-11-08. Col. Charles Deerwester claimed to be the first pilot to "thread the needle" by flying between the two peaks.Kenneth B. Ragsdale, Wings over the Mexican Border: Pioneer Military Aviation in the Big Bend, University of Texas Press, 2010, . The first ascent of the summit was made in the 1940s by Jan and Herb Conn.
See also List of mountain peaks of Texas Geography of Texas
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Mule Ear Peaks: Weather Mule Ear Peaks (photo): Flickr Mule Ear Peaks (photo): Flickr