Grandjean Peak

Grandjean Peak
Grandjean Peak
	East aspect. Left to rightː 9144, 9180 East, 9120, 9180 West
Highest point
Elevation	9,180 ft (2,798 m)
Prominence	680 ft (207 m)
Parent peak	Tohobit Peak (10,046 ft)
Isolation	2.51 mi (4.04 km)
Listing	Peaks of the Sawtooth Range
Coordinates	44°06′59″N115°06′16″W / 44.1162705°N 115.1043478°W
Naming
Etymology	Emile Grandjean
Geography
	Grandjean Peak Location in Idaho Grandjean Peak Grandjean Peak (the United States)
Country	United States
State	Idaho
County	Boise
Protected area	Sawtooth Wilderness
Parent range	Sawtooth Range ; Rocky Mountains
Topo map	USGS Warbonnet Peak
Geology
Rock age	Eocene
Mountain type	Fault block
Rock type	Granite
Climbing
First ascent	1994 by Greg Parker
Easiest route	class 4

Last updated January 06, 2025

Grandjean Peak is a 9,180-foot-elevation (2,798-meter) mountain summit in Boise County, Idaho, United States.

Description

Grandjean Peak is part of the Sawtooth Range which is a subset of the Rocky Mountains.^[4] This mountain with multiple high points is located 11 miles (18 km) southwest of Stanley, Idaho, in the Sawtooth Wilderness on land managed by Boise National Forest. Precipitation runoff from the mountain's slopes drains to the South Fork Payette River via Baron and Goat creeks. Topographic relief is significant as the summit rises 3,580 feet (1,090 meters) above Baron Creek in one mile (1.6 km) and 3,180 feet (970 meters) above Goat Creek in 0.85 mile (1.37 km).

Etymology

The mountain is named after Emile Grandjean (1861–1942), who served as the first supervisor of Boise National Forest from 1908 to 1922.^[1] This landform's toponym has been officially adopted by the United States Board on Geographic Names.^[3]

Climate

Based on the Köppen climate classification, Grandjean Peak is located in an alpine subarctic climate zone with long, cold, snowy winters, and cool to warm summers.^[5] Winter temperatures can drop below −10 °F with wind chill factors below −30 °F.

Related Research Articles

Lowman is a small rural census-designated place in Boise County, Idaho, United States. It is nestled along the north bank of the South Fork of the Payette River in the central part of the state, at an elevation of 3,960 feet (1,210 m) above sea level. As of the 2010 census, its population was 42.

The Sawtooth Range is a mountain range of the Rocky Mountains in central Idaho, United States, reaching a maximum elevation of 10,751 feet (3,277 m) at the summit of Thompson Peak. It encompasses an area of 678 square miles (1,756 km²) spanning parts of Custer, Boise, Blaine, and Elmore counties, and is bordered to the east by the Sawtooth Valley. Much of the mountain range is within the Sawtooth Wilderness, part of the Sawtooth National Recreation Area and Sawtooth National Forest.

Thompson Peak is the highest peak in the Sawtooth Range of Idaho. Its 10,751 ft (3,277 m) summit is located within Custer County, although some of the lower portion of the mountain is in Boise County. Thompson Peak is also located within the Sawtooth Wilderness portion of the Sawtooth National Recreation Area, a unit of Sawtooth National Forest. The town of Stanley, Idaho is about 6 miles (9.7 km) northeast of Thompson Peak.

Mount Cramer, at 10,716 feet (3,266 m) is the second highest peak in the Sawtooth Range of Idaho. The summit of Mount Cramer is located on the border of Custer and Boise Counties. The peak is the highest point in Boise County. Mount Cramer is also located within the Sawtooth Wilderness portion of the Sawtooth National Recreation Area. The town of Stanley, Idaho is almost 14 miles (23 km) from Mount Cramer, while the area known as Sawtooth City is nearly 12 miles (19 km) from Mount Cramer. The west side of Mount Cramer drains into the South Fork of the Payette River, while the east side drains to the Salmon River.

State Highway 21 (SH-21), also known as the Ponderosa Pine Scenic Byway, is a state highway in Idaho. It runs from Boise to Stanley, primarily as a two-lane road. With two-thirds of its length in Boise County, it passes by historic Idaho City and the village of Lowman to the western edge of the Sawtooth Mountains, then along their northern boundary to Stanley.

Smoky Dome, at 10,095 feet (3,077 m) above sea level is the highest peak in the Soldier Mountains of Idaho. Smoky Dome is located northwest of Fairfield in Camas County and Sawtooth National Forest.

Two Point Mountain is the highest point in the Boise Mountains with a summit elevation of 10,124 feet (3,086 m) located in the Fairfield Ranger District of Sawtooth National Forest, Idaho. It is located 12.67 miles (20.39 km) from Perfect Peak in the Sawtooth Range, its line parent, giving it a prominence of 1,524 feet (465 m). Two Point Mountain is named for having two peaks: its main summit and a second summit about 0.4 miles (0.64 km) to the northwest that rises to an elevation of 10,060 feet (3,070 m). The mountain is within the watershed of the South Fork Boise River where the south side is drained by Bear Creek and the north side by the Ross Fork. No maintained trails lead to either summit.

Boulder Peak is a 10,981-foot elevation (3,347 m) mountain summit located in Blaine County, Idaho, United States.

Easley Peak is an 11,108-foot elevation (3,386 m) mountain summit located on the common border that Blaine County shares with Custer County, in Idaho, United States.

Monte Verita is a 10,140-foot elevation (3,091 m) mountain summit located in Boise County, Idaho, United States.

North Raker is a 9,970-foot elevation (3,039 m) mountain summit located in Boise County, Idaho, United States.

Freeman Peak is a 10,273-foot elevation (3,131 m) mountain summit located in Lemhi County, Idaho, United States.

Sacajawea Peak is an 11,936-foot elevation (3,638 m) mountain summit in Custer County, Idaho, United States.

Tohobit Peak is a 10,046-foot elevation (3,062 m) mountain summit located in Boise County, Idaho, United States.

The General is a 10,329-foot elevation (3,148 m) mountain summit in Custer County, Idaho, United States.

Scotchman Peak is a 7,018-foot-elevation (2,139 m) mountain summit in Bonner County, Idaho, United States.

Finger of Fate is a 9,780-foot-elevation (2,981 m) pillar in Custer County, Idaho, United States.

Silver Peak is an 11,125-foot-elevation (3,391 m) mountain summit in Idaho, United States.

Silver Peak is an 11,167-foot-elevation (3,404 m) mountain summit in Idaho, United States.

Mystery Mountain is a 9,830-foot-elevation (2,996 m) summit in Custer County, Idaho, United States.

References

1 2 3 4 5 "Idaho: A Climbing Guide, Grandjean Peak". idahoaclimbingguide.com. Retrieved September 18, 2023.
1 2 3 "Grandjean Peak - 9,180' ID". listsofjohn.com. Retrieved September 18, 2023.
1 2 "Grandjean Peak". Geographic Names Information System . United States Geological Survey, United States Department of the Interior . Retrieved September 18, 2023.
↑ "Grandjean Peak, Idaho". Peakbagger.com. Retrieved September 18, 2023.
↑ Peel, M. C.; Finlayson, B. L.; McMahon, T. A. (2007). "Updated world map of the Köppen−Geiger climate classification". Hydrol. Earth Syst. Sci. 11: 1633–1644. ISSN 1027-5606.

External links

Grandjean Peak: Idaho: A Climbing Guide
Grandjean Peak: weather forecast

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Text is available under the CC BY-SA 4.0 license; additional terms may apply.
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[ICG-1] 1 2 3 4 5 "Idaho: A Climbing Guide, Grandjean Peak". idahoaclimbingguide.com. Retrieved September 18, 2023.

[loj-2] 1 2 3 "Grandjean Peak - 9,180' ID". listsofjohn.com. Retrieved September 18, 2023.

[gnis-3] 1 2 "Grandjean Peak". Geographic Names Information System . United States Geological Survey, United States Department of the Interior . Retrieved September 18, 2023.

[peakbagger-4] "Grandjean Peak, Idaho". Peakbagger.com. Retrieved September 18, 2023.

[Peel-5] Peel, M. C.; Finlayson, B. L.; McMahon, T. A. (2007). "Updated world map of the Köppen−Geiger climate classification". Hydrol. Earth Syst. Sci. 11: 1633–1644. ISSN 1027-5606.

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