Acker Peak

Acker Peak is a summit in Yosemite National Park in Tuolumne County, California, United States.^[4] With an elevation of 10,988 feet (3,349 m), Acker Peak is the 665th-highest summit in the state of California.^[5]

Acker Peak
North aspect, centered
Highest point
Elevation	10,988 ft (3,349 m)[1]
Prominence	908 ft (277 m)[2]
Isolation	1.34 mi (2.16 km)[2]
Coordinates	38°06′32″N 119°30′35″W[3]
Geography
Acker Peak Location in California Show map of California Acker Peak Acker Peak (the United States) Show map of the United States
Location	Yosemite National Park Tuolumne County California, United States
Parent range	Sierra Nevada
Topo map	USGS Piute Mountain
Geology
Rock age	Cretaceous
Mountain type	Fault block
Rock type	Granodiorite
Climbing
First ascent	1945
Easiest route	class 2 East slope[1] Southwest slope

The summit was named for William Bertrand Acker, a park official.^[6] This geographical feature's toponym was officially adopted in 1932 by the U.S. Board on Geographic Names.^[3]

The first ascent of the summit was made July 27, 1945, by Arthur J. Reyman.^[1]

Climate

According to the Köppen climate classification system, Acker Peak is located in an alpine climate zone.^[7] Most weather fronts originate in the Pacific Ocean, and travel east toward the Sierra Nevada mountains. As fronts approach, they are forced upward by the peaks (orographic lift), causing them to drop their moisture in the form of rain or snowfall onto the range.

See also

• Mountains portal
• Geology of the Yosemite area