Porcupine Peak (Washington)

Porcupine Peak
Porcupine Peak
	Porcupine Peak from eastbound North Cascades Highway
Highest point
Elevation	7,762 ft (2,366 m)
Prominence	922 ft (281 m)
Parent peak	Peak 7865
Isolation	2.19 mi (3.52 km)
Coordinates	48°33′01″N120°44′12″W / 48.550271°N 120.736653°W
Geography
	Porcupine Peak Location in Washington Porcupine Peak Porcupine Peak (the United States)
Country	United States
State	Washington
County	Skagit
Parent range	North Cascades
Topo map	USGS Washington Pass
Geology
Type of rock	Granite
Climbing
Easiest route	Scrambling, class 3

Last updated April 04, 2024

Porcupine Peak is a 7,762-foot-elevation (2,366-meter) mountain located in Skagit County of Washington state.

Description

Porcupine Peak is part of the Okanogan Range which is a sub-range of the North Cascades Range.^[1] It is situated north of Rainy Pass and south of Mount Hardy on land administered by the Okanogan–Wenatchee National Forest. The nearest higher peak is Cutthroat Peak, 2.19 miles (3.52 km) to the southeast.^[1] Porcupine Peak can be seen from the North Cascades Highway which follows below the southwest slopes of the mountain. Precipitation runoff from the mountain drains into the Porcupine Creek, Swamp Creek, and Granite Creek. These three creeks, which nearly encircle the mountain, ultimately empty to the Skagit River. Topographic relief is significant as the summit rises 3,600 feet (1,100 meters) above Granite Creek in 1.3 mile (2.1 km).

Climate

Porcupine Peak is located in the marine west coast climate zone of western North America.^[3] Most weather fronts originating in the Pacific Ocean travel northeast toward the Cascade Mountains. As fronts approach the North Cascades, they are forced upward by the peaks of the Cascade Range (orographic lift), causing them to drop their moisture in the form of rain or snowfall onto the Cascades. As a result, the west side of the North Cascades experiences high precipitation, especially during the winter months in the form of snowfall. Because of maritime influence, snow tends to be wet and heavy, resulting in high avalanche danger.^[4] During winter months, weather is usually cloudy, but, due to high pressure systems over the Pacific Ocean that intensify during summer months, there is often little or no cloud cover during the summer.^[4]

Geology

The North Cascades features some of the most rugged topography in the Cascade Range with craggy peaks, ridges, and deep glacial valleys. Geological events occurring many years ago created the diverse topography and drastic elevation changes over the Cascade Range leading to the various climate differences. These climate differences lead to vegetation variety defining the ecoregions in this area.

The history of the formation of the Cascade Mountains dates back millions of years ago to the late Eocene Epoch.^[5] With the North American Plate overriding the Pacific Plate, episodes of volcanic igneous activity persisted.^[5] In addition, small fragments of the oceanic and continental lithosphere called terranes created the North Cascades about 50 million years ago.^[5]

During the Pleistocene period dating back over two million years ago, glaciation advancing and retreating repeatedly scoured the landscape leaving deposits of rock debris.^[5] The U-shaped cross section of the river valleys is a result of recent glaciation. Uplift and faulting in combination with glaciation have been the dominant processes which have created the tall peaks and deep valleys of the North Cascades area.

Gallery

East aspect from Cutthroat Pass
South aspect, from Maple Pass trail
Mt. Hardy (left), Golden Horn, and Porcupine Peak (right)

Related Research Articles

Tower Mountain is a prominent non-volcanic mountain located on the boundary line of Okanogan and Skagit counties in Washington state. It is part of the Okanogan Range which is a sub-range of the North Cascades Range. Tower Mountain situated on land administered by the Okanogan–Wenatchee National Forest.

Cutthroat Peak is an 8,066-foot-elevation (2,459-meter) granitic mountain located on the boundary of Chelan County and Skagit County, in Washington state. The mountain is part of the Okanagan Range which is a subrange of the Cascade Range, and it is situated within the Okanogan–Wenatchee National Forest. Cutthroat Peak is set about two miles west of Washington Pass and one mile east of Rainy Pass. It is a prominent landmark along the North Cascades Highway with an accessible climbing route. Topographic relief is significant as the summit rises over 3,000 feet above State Creek in one mile (1.6 km). There is also a Cutthroat Lake, Cutthroat Creek, and Cutthroat Pass on its north and east aspects. This landform's toponym was officially adopted in 1988 by the United States Board on Geographic Names. Molar Tooth is a granite pillar half a mile north on the ridge extending to Cutthroat Pass.

Mount Hardy is an 8,099-foot (2,469-metre) mountain summit located on the common border of Okanogan County with Skagit County in Washington state. It is part of the Okanogan Range which is a sub-range of the North Cascades Range. Mount Hardy is situated west of Methow Pass, at headwaters of the Methow River, on land administered by the Okanogan–Wenatchee National Forest. Topographic relief is significant as the summit rises approximately 2,500 feet above the West Fork Methow River in one-half mile (0.8 km). The nearest higher peak is Golden Horn, 1.75 miles (2.82 km) to the northeast. Mount Hardy can be seen from the North Cascades Highway which traverses below the southwestern base of the mountain. This mountain's toponym was officially adopted in 1973 by the United States Board on Geographic Names.

The Needles is an 8,160-foot (2,487-metre) granite mountain located in Okanogan County in Washington state. It is part of the Okanogan Range which is a sub-range of the North Cascades Range. The Needles is situated on land administered by the Okanogan–Wenatchee National Forest. Precipitation runoff from the peak drains into tributaries of the Methow River. Topographic relief is significant as the summit rises 3,660 feet above Pine Creek in approximately 1.25 mile (2 km). The nearest higher neighbor is Tower Mountain, 2.26 miles (3.64 km) to the southwest.

Hinkhouse Peak is a 7,566-foot-elevation (2,306-meter) mountain summit located on the shared border of Okanogan County and Chelan County in Washington state. It is part of the Okanogan Range which is a sub-range of the North Cascades Range. Hinkhouse Peak is situated on land administered by the Okanogan–Wenatchee National Forest. The nearest higher neighbor is Liberty Bell Mountain, 1.52 miles (2.45 km) to the south. Hinkhouse Peak is situated north of Washington Pass, at the east end of a high ridge which connects to Cutthroat Peak. A high ridge extending northeast connects it to Constitution Crags. Most precipitation runoff from the peak drains into Early Winters Creek which is a tributary of the Methow River, but the south slope drains into a tributary of the Chelan River. Topographic relief is significant as it rises nearly 3,200 feet above Early Winters Creek in approximately one mile (1.6 km).

Azurite Peak is an 8,434-foot (2,571-metre) double-summit mountain located at the common boundary point of Okanogan County, Skagit County, and Whatcom County in Washington state. It is part of the Okanogan Range which is a sub-range of the North Cascades Range. Azurite Peak ranks as the 81st-highest summit in the state. Azurite Peak is situated north of Azurite Pass on land administered by the Okanogan–Wenatchee National Forest. The nearest higher neighbor is Tower Mountain, 5.24 miles (8.43 km) to the south-southeast, and Mount Ballard lies 1.97 miles (3.17 km) to the north. Remnants of a small pocket glacier are found on the east aspect. Precipitation runoff from the peak drains north into tributaries of the Skagit River, and south into the Methow River. Topographic relief is significant as the summit rises over 3,000 feet above Mill Creek in one mile (1.6 km). The Pacific Crest Trail traverses the base of Azurite Peak.

McKay Ridge is a 7,000+ ft ridge located in Whatcom County in Washington state. It is part of the Okanogan Range which is a sub-range of the North Cascades. It's situated north of the North Cascades Highway on land administered by the Okanogan–Wenatchee National Forest. The nearest higher peak is Majestic Mountain, 1.6 miles (2.6 km) to the northeast. Precipitation runoff from the ridge drains into Ross Lake via tributaries of the Skagit River.

Blackbeard Peak, also spelled Black Beard Peak, is a 7,241-foot mountain summit in the North Cascades in the U.S. state of Washington. It is located in the Okanogan–Wenatchee National Forest in Skagit County. It is situated northwest of Rainy Pass, southwest of Porcupine Peak, and southeast of Graybeard Peak. Its nearest higher neighbor is Repulse Peak, 1.06 mi (1.71 km) to the west. Blackbeard Peak can be seen from the North Cascades Highway. Precipitation runoff from Blackbeard Peak drains into Granite Creek, a tributary of the Skagit River. Topographic relief is significant as the summit rises over 3,000 feet above Granite Creek in one mile (1.6 km).

Jabberwocky Tower is a 6,840-foot-elevation granite spire located in Chelan County of Washington state. Jabberwocky Tower is part of The Enchantments within the Alpine Lakes Wilderness. It belongs to the Stuart Range which is subset of the Cascade Range. Jabberwocky Tower is situated east of Colchuck Lake and west of Enchantment Peak. Precipitation runoff drains into Icicle Creek, a tributary of the Wenatchee River.

Crooked Bum is a 6,937-foot-elevation mountain summit on the crest of the North Cascades in the U.S. state of Washington. It is located in the Okanogan–Wenatchee National Forest on the shared border of Skagit County and Chelan County. It is situated immediately west of Rainy Pass and two miles east of Corteo Peak. The scenic and popular Maple Pass Trail traverses the south slope of the peak while staying above Lake Ann. Precipitation runoff from the north slope of Crooked Bum drains into Granite Creek which is a tributary of the Skagit River, whereas the south side drains into Bridge Creek which is a tributary of the Chelan River.

Holliway Mountain is an 8000+ ft granite summit located in Okanogan County in Washington state. It is part of the Okanogan Range which is a sub-range of the North Cascades Range. Holliway Mountain is situated near the headwaters of the Methow River on land administered by the Okanogan–Wenatchee National Forest. The nearest higher peak is Golden Horn, 0.91 miles (1.46 km) to the south. Azurite Peak is located three miles to the north-northwest.

Molar Tooth is a 7,547-foot-elevation (2,300-meter) granite summit located on the shared border of Okanogan County and Skagit County, in Washington state. The mountain is part of the Okanagan Range which is a subset of the Cascade Range. Set in the Okanogan–Wenatchee National Forest, Molar Tooth is situated south of Cutthroat Pass, and 0.57 miles (0.92 km) north of Cutthroat Peak, which is also its nearest higher peak. The easiest climbing route is class 4 scrambling, but solid rock provides class 5 technical routes as well. Precipitation runoff from the east side of Molar Tooth drains into tributaries of the Methow River, whereas runoff from the west side drains into tributaries of the Skagit River.

Mount Ballard is an 8,371-foot (2,551-metre) double-summit mountain located in eastern Whatcom County of Washington state. It is part of the Okanogan Range which is a sub-range of the North Cascades Range, and the mountain is situated on land administered by the Okanogan–Wenatchee National Forest. Ballard ranks 84th on Washington's highest 100 peaks. The nearest higher neighbor is Azurite Peak, 2.04 miles (3.28 km) to the south. Precipitation runoff from Mount Ballard drains into Mill Creek and Slate Creek, both tributaries of the Skagit River. Topographic relief is significant as the summit rises approximately 4,000 feet above Mill Creek in one mile (1.6 km).

Castle Peak is a prominent 8,343-foot (2,543-metre) mountain summit located in the Hozameen Range of the North Cascades, on the shared border between Okanogan County and Whatcom County of Washington state. The mountain is situated one mile (1.6 km) south of the Canada–United States border, on the Cascade crest, in the Pasayten Wilderness, on land managed by the Okanogan–Wenatchee National Forest. The nearest higher peak is Jack Mountain, 14.8 miles (23.8 km) to the south-southwest. Castle Peak is the second highest summit of the Hozameen Range following Jack Mountain. Castle Peak is the sixth-highest mountain in the Pasayten Wilderness. Precipitation runoff from the mountain drains east into Castle Creek, a tributary of the Similkameen River, or west into tributaries of the Skagit River. Topographic relief is significant as the summit rises nearly 3,000 feet above Crow Creek in 0.75 mile (1.2 km).

Skagit Peak is a 6,824-foot (2,080-metre) mountain summit located in the North Cascades, in Whatcom County of Washington state. It is situated on the western side of the Cascade crest, at the western edge of the Pasayten Wilderness, on land managed by the Okanogan–Wenatchee National Forest. Skagit Peak is part of the Hozameen Range, a subset of the North Cascades which also includes Hozomeen Mountain to the north, and Jack Mountain to the south. Precipitation runoff from this mountain drains into the Skagit River via Three Fools Creek and Ross Lake.

Spratt Mountain is a 7,258-foot (2,212-metre) mountain summit located in the North Cascades, in Whatcom County of Washington state. It is situated on the western side of the Cascade crest, at the western edge of the Pasayten Wilderness, on land managed by the Okanogan–Wenatchee National Forest. Spratt Mountain is part of the Hozameen Range, a subset of the North Cascades which also includes Skagit Peak four miles to the north, and Jack Mountain six miles to the south. Precipitation runoff from this mountain drains into Ross Lake via Three Fools Creek and Dry Creek.

Tatie Peak is a 7,386-foot (2,251-metre) mountain summit located on the shared border between Okanogan County and Whatcom County in Washington state. It is part of the Okanogan Range, which is a sub-range of the North Cascades. The mountain is situated 2.6 miles (4.2 km) east of Mount Ballard, and 3.3 miles (5.3 km) south of Slate Peak, on land managed by the Okanogan–Wenatchee National Forest. The nearest higher neighbor is Syncline Mountain, 0.8 miles (1.3 km) to the south-southwest. The Pacific Crest Trail traverses the south slope of the peak, with an easy off-trail scramble to reach the summit. Precipitation runoff from Tatie Peak drains south into Trout Creek which is a tributary of the Methow River, or northwest into Slate Creek, which is part of the Skagit River drainage basin.

Syncline Mountain is a 7,560-foot (2,300-metre) mountain summit located on the shared border between Okanogan County and Whatcom County in Washington state. It is part of the Okanogan Range, which is a sub-range of the North Cascades, and is situated on land managed by the Okanogan–Wenatchee National Forest. Its nearest neighbor is Tatie Peak, 0.8 miles (1.3 km) to the north, and the nearest higher neighbor is Mount Ballard, 2.1 miles (3.4 km) to the west. The Pacific Crest Trail traverses the east slope of the peak, with an off-trail scramble to reach the summit. Precipitation runoff from Syncline Mountain drains east into Trout Creek which is a tributary of the Methow River, or northwest into Slate Creek, which is part of the Skagit River drainage basin. This unofficially named mountain features a conspicuous syncline, hence its descriptive name.

Le Conte Mountain is a 7,762-foot-elevation (2,366-meter) summit located on the shared boundary of Skagit County and Chelan County in Washington state. It is positioned on the crest of the North Cascades Range, and is set within the Glacier Peak Wilderness. Le Conte Mountain is situated on the shared border of Mount Baker-Snoqualmie National Forest and Okanogan-Wenatchee National Forest. Access to the peak is via the Ptarmigan Traverse. The nearest higher neighbor is Sentinel Peak, 1.87 miles (3.01 km) to the south-southeast, and Spider Mountain is 2.4 miles (3.9 km) to the northeast. The Le Conte Glacier and South Cascade Glacier lie to the south of the peak. Precipitation runoff on the east side the mountain drains into Flat Creek which is a tributary of the Stehekin River, while precipitation drains into headwaters of the South Fork Cascade River from the west side. Topographic relief is significant as the southwest aspect rises nearly 2,500 feet above South Cascade Lake in less than one-half mile, and the northeast aspect rises 3,200 feet above Flat Creek in one mile.

Majestic Mountain is a 7,530-foot-elevation (2,300-meter) mountain summit located in Whatcom County in Washington state.

References

1 2 3 4 5 6 "Porcupine Peak, Washington". Peakbagger.com.
↑ "Porcupine Peak - 7,762' WA". listsofjohn.com. Retrieved 2023-08-05.
↑ Beckey, Fred W. Cascade Alpine Guide, Climbing and High Routes. Seattle, WA: Mountaineers Books, 2008.
1 2 Beckey, p. 16
1 2 3 4 Kruckeberg, Arthur (1991). The Natural History of Puget Sound Country. University of Washington Press.

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[pb-1] 1 2 3 4 5 6 "Porcupine Peak, Washington". Peakbagger.com.

[listsofjohn-2] "Porcupine Peak - 7,762' WA". listsofjohn.com. Retrieved 2023-08-05.

[Beckey,_Fred_W_2008-3] Beckey, Fred W. Cascade Alpine Guide, Climbing and High Routes. Seattle, WA: Mountaineers Books, 2008.

[Beckey_16-4] 1 2 Beckey, p. 16

[Kruckeberg-5] 1 2 3 4 Kruckeberg, Arthur (1991). The Natural History of Puget Sound Country. University of Washington Press.

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