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Hyndman Peak
Hyndman Peak
	Hyndman Peak
Highest point
Elevation	12,012 ft (3,661 m) NAVD 88
Prominence	4,809 ft (1,466 m)
Coordinates	43°44′58″N 114°07′52″W / 43.749432°N 114.131169°W
Geography
	Hyndman Peak Custer and Blaine Counties, Idaho, U.S. Hyndman Peak Hyndman Peak (the United States)
Parent range	Pioneer Mountains
Topo map	USGS Hyndman Peak
Climbing
First ascent	1889; 135 years ago
Easiest route	Simple Scrambling, class 2

Hyndman Peak, at an elevation of 12,012 feet (3,661 m) above sea level, is the ninth highest peak in Idaho and the highest point in the Pioneer Mountains, Sawtooth National Forest, and Blaine County. Hyndman Peak is located on the border of Custer and Blaine counties.^[3] The towns of Hailey, Ketchum, and Sun Valley are west of the peak.

The mountain was named after Major William Hyndman, an early settler,^[4] and businessperson in the local mining industry.^[5] The first recorded ascent of Hyndman Peak was made in 1889 by W. T. Griswold and E. T. Perkins.^[6] The primary route to the summit is class 2, which along with its proximity to Sun Valley makes it a popular destination.

The trailhead to hike to Hyndman Peak is located at the end of Sawtooth National Forest road 203 along Hyndman Creek. The primary route is approximately six miles (10 km) one way from the trailhead and traverses through Hyndman Basin, which is bordered by Hyndman, Old Hyndman, and Cobb Peaks.^[7] The route follows an unmaintained trail and ascends the Hyndman-Old Hyndman saddle before reaching the summit.

Climate

Climate data for Hyndman Peak 43.7508 N, 114.1329 W, Elevation: 11,266 ft (3,434 m) (1991–2020 normals)
Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year
Mean daily maximum °F (°C)	20.9 (−6.2)	20.3 (−6.5)	24.4 (−4.2)	29.7 (−1.3)	39.3 (4.1)	49.1 (9.5)	60.6 (15.9)	60.1 (15.6)	51.2 (10.7)	38.2 (3.4)	25.8 (−3.4)	20.0 (−6.7)	36.6 (2.6)
Daily mean °F (°C)	13.3 (−10.4)	11.8 (−11.2)	14.9 (−9.5)	19.2 (−7.1)	28.0 (−2.2)	37.0 (2.8)	47.2 (8.4)	46.6 (8.1)	38.2 (3.4)	27.5 (−2.5)	18.0 (−7.8)	12.6 (−10.8)	26.2 (−3.2)
Mean daily minimum °F (°C)	5.8 (−14.6)	3.2 (−16.0)	5.4 (−14.8)	8.8 (−12.9)	16.7 (−8.5)	24.9 (−3.9)	33.8 (1.0)	33.2 (0.7)	25.3 (−3.7)	16.8 (−8.4)	10.2 (−12.1)	5.3 (−14.8)	15.8 (−9.0)
Average precipitation inches (mm)	4.09 (104)	3.88 (99)	3.25 (83)	3.10 (79)	3.66 (93)	2.26 (57)	1.27 (32)	1.02 (26)	2.05 (52)	3.26 (83)	2.72 (69)	5.06 (129)	35.62 (906)
Source: PRISM Climate Group^[8]

View from the summit
North face, aerial

References

^ ^a ^b "Hyndman". NGS Data Sheet. National Geodetic Survey, National Oceanic and Atmospheric Administration, United States Department of Commerce. Retrieved 2021-05-27.
^ "Hyndman Peak, Idaho". Peakbagger.com. Retrieved 2021-05-27.
^ Sawtooth National Forest. "Sawtooth National Forest" [map].1:126,720, 1"=2 miles. Twin Falls, Idaho: Sawtooth National Forest, United States Forest Service, 1998.
^ Rees, John E. (1918). Idaho Chronology, Nomenclature, Bibliography. W.B. Conkey Company. p. 78.
^ Biennial Report of the Board of Trustees of the State Historical Society of Idaho. Idaho State Historical Society. 1922. p. 19.
^ "Idaho 12ers". Idaho 12ers. Retrieved 2011-12-26.
^ "Hyndman Peak, ID". High-Powered Planet. Retrieved 2011-12-26.
^ "PRISM Climate Group, Oregon State University". PRISM Climate Group, Oregon State University. Retrieved October 2, 2023. To find the table data on the PRISM website, start by clicking Coordinates (under Location); copy Latitude and Longitude figures from top of table; click Zoom to location; click Precipitation, Minimum temp, Mean temp, Maximum temp; click 30-year normals, 1991-2020; click 800m; click Retrieve Time Series button.