Jumbo Mountain

Jumbo Mountain
Jumbo Mountain
	Jumbo Mountain seen from the north
Highest point
Elevation	5,840 ft (1,780 m)
Prominence	1,800 ft (550 m)
Coordinates	48°11′44″N121°35′59″W / 48.195654°N 121.59959°W
Geography
	Jumbo Mountain Snohomish County, Washington, U.S. Jumbo Mountain Jumbo Mountain (the United States)
Parent range	Cascade Range
Topo map	USGS Helena Ridge
Geology
Type of rock	Shale and Sandstone
Climbing
Easiest route	Scrambling

Last updated January 17, 2024

Jumbo Mountain^[2] is a 5840+ ft summit near the western edge of the North Cascades, in Snohomish County of Washington state. It is located four miles south of Darrington, Washington, along the Mountain Loop Highway. It is situated in the Boulder River Wilderness on land administered by the Mount Baker-Snoqualmie National Forest. The mountain was named by miners for its resemblance to an elephant. The nearest higher peak is Buckeye Peak, 3.34 miles (5.38 km) to the west.^[1] Precipitation runoff from Jumbo Mountain drains into tributaries of the Stillaguamish River and Sauk River.

Climate

Jumbo Mountain is located in the marine west coast climate zone of western North America.^[3] Most weather fronts originate in the Pacific Ocean, and travel northeast toward the Cascade Mountains. As fronts approach the North Cascades, they are forced upward by the peaks of the Cascade Range, causing them to drop their moisture in the form of rain or snowfall onto the Cascades (Orographic lift). As a result, the west side of the North Cascades experiences high precipitation, especially during the winter months in the form of snowfall.^[3] Due to its temperate climate and proximity to the Pacific Ocean, areas west of the Cascade Crest very rarely experience temperatures below 0 °F (−18 °C) or above 80 °F (27 °C).^[3] 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] Because of maritime influence, snow tends to be wet and heavy, resulting in high avalanche danger.^[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.

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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.

Gunn Peak is a 6,244-foot (1,903-metre) mountain summit located in Snohomish County, Washington. The mountain is part of the Cascade Range. Gunn Peak is the highest point of the Wild Sky Wilderness. The mountain was named for homesteader/miner Amos Gunn who started the nearby town of Index, Washington, and also named nearby Mount Index. Precipitation runoff from the mountain drains into tributaries of the Skykomish River.

Cutthroat Peak is an 8,050-foot-elevation (2,450-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 subset of the Cascade Range, and is situated within the Okanogan-Wenatchee National Forest. Cutthroat Peak is about two miles west of Washington Pass and one mile east of Rainy Pass. It's a prominent landmark along the North Cascades Highway with an accessible climbing route. There is also a Cutthroat Lake, Cutthroat Creek, and Cutthroat Pass on its north and east aspects. This geographical feature's name 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.

The Needles is an 8,160-foot (2,490-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. The nearest higher peak is Tower Mountain, 2.26 miles (3.64 km) to the southwest.

Gilbert Mountain is an 8,023-foot (2,445-metre) massif located in Okanogan County in Washington state. It is part of the North Cascades Range, and is situated in the Lake Chelan-Sawtooth Wilderness. The northwestern extreme of the Gilbert massif connects to the southern end of Kangaroo Ridge. Precipitation runoff from the mountain drains into the Twisp River. Topographic relief is significant as it rises over 4,000 feet above the river in approximately one mile.

Fisher Peak is an 8,040-foot-elevation mountain summit located in the North Cascades of Washington state. It is situated on the borders of the Stephen Mather Wilderness and North Cascades National Park, midway between Black Peak and Easy Pass, and adjacent to Repulse Peak. Precipitation runoff from Fisher Peak drains into tributaries of the Skagit River.

Trapper Mountain is a 7,530-foot (2,300-metre) summit located in Chelan County of Washington state. It is part of the North Cascades Range. Trapper Mountain is situated southeast of Cascade Pass on the shared border of North Cascades National Park and Glacier Peak Wilderness. The nearest higher peak is Hurry-up Peak, 0.92 miles (1.48 km) to the west. Surface runoff from the mountain drains into Trapper Lake and tributaries of the Stehekin River.

Mix-up Peak, also known as Mixup Peak, is a 7,440-foot (2,270-metre) mountain summit located on the shared boundary of Skagit County and Chelan County in Washington state. It is part of the North Cascades Range and is situated one mile south of Cascade Pass on the shared border of North Cascades National Park and Glacier Peak Wilderness. The nearest higher peak is Magic Mountain, 1.02 miles (1.64 km) to the east-southeast. Mix-up Peak is at the northern end of the Ptarmigan Traverse which is an alpine route to remote mountains such as Mount Formidable and Dome Peak. The Cache Glacier occupies a cirque below its eastern flank. Surface runoff on the east side the mountain drains into the Stehekin River, whereas precipitation runoff drains into the Cascade River from the west side.

Repulse Peak is a 7,923-foot (2,415-metre) mountain summit in the North Cascades in the U.S. state of Washington. It is located on the border of the Stephen Mather Wilderness and North Cascades National Park. It's situated midway between Black Peak and Fisher Peak, and can be seen from the North Cascades Highway. Precipitation runoff from Repulse Peak drains into tributaries of the Skagit River and Stehekin River.

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.

Enchantment Peak is an 8,520+ ft granite summit located in Chelan County of Washington state. Enchantment Peak is part of The Enchantments within the Alpine Lakes Wilderness. Enchantment Peak belongs to the Stuart Range which is subset of the Cascade Range. Enchantment Peak is situated midway between Prusik Peak to its east, and Aasgard Pass and Dragontail Peak to the west. Precipitation runoff drains into Icicle Creek, a tributary of the Wenatchee River.

Pierce Mountain is a 4,973+ ft summit in the North Cascades Range of Washington, United States. It is located within North Cascades National Park and Stephen Mather Wilderness. It is situated above Ross Dam, at the eastern culmination of Sourdough Mountain. Like many North Cascade peaks, Pierce Mountain is more notable for its large, steep rise above local terrain than for its absolute elevation. Precipitation runoff from the mountain drains into the Skagit River via Pierce Creek and Ross Lake.

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.

Red Mountain is a 7,662 feet (2,335 m) summit in the North Cascades Range of Washington, United States. It is located in Skagit County and within North Cascades National Park and the Stephen Mather Wilderness. It is situated on a smooth ridge of brick-red color at the western culmination of Ragged Ridge.

Preacher Mountain is a broad summit located in King County of Washington state. It's located at the western edge of the Cascade Range and is within the Alpine Lakes Wilderness on land managed by Mount Baker-Snoqualmie National Forest. The nearest higher peak is Kaleetan Peak, 3.11 miles (5.01 km) to the southeast. The Pulpit is situated 2.19 miles to the northwest. Precipitation runoff from the mountain drains into tributaries of the Snoqualmie River.

Copper Benchmark, also known as Copper Point, is a mountain summit located in the Methow Mountains, a sub-range of the North Cascades, on the shared border between Okanogan County and Chelan County in Washington state. Copper Benchmark is situated on the crest of the Cascade Range between Kangaroo Pass and Copper Pass. It was used as a triangulation station for early surveying. It is protected by the Lake Chelan-Sawtooth Wilderness within the Okanogan–Wenatchee National Forest. Copper Benchmark has a subsidiary peak, Pica Peak (elevation 7,565 feet, which is 0.52 miles northwest of the summit. The nearest higher peak is Wallaby Peak, 0.9 miles to the northeast. Precipitation runoff on the north side of the mountain drains into the Methow River via Early Winters Creek, whereas the other sides of the mountain drain into tributaries of the Chelan River.

Mineral Mountain is a 6,800-foot (2,100-metre) mountain summit in the Skagit Range of the North Cascades of Washington state. Mineral Mountain is situated in North Cascades National Park and the summit offers views of Mount Shuksan, Icy Peak, and the Picket Range. Easy Peak is set 2 mi (3.2 km) to the east, and the nearest higher neighbor is Ruth Mountain, 3.06 mi (4.92 km) to the west. Precipitation runoff from Mineral Mountain finds its way north into the Chilliwack River, and south into the Baker River.

Tricouni Peak is an 8,102-foot (2,469-metre) mountain summit located in Skagit County of Washington state. It is situated in North Cascades National Park, north of the North Klawatti Glacier and southeast of the Borealis Glacier. Its nearest higher peak is Primus Peak, 0.54 mi (0.87 km) to the west. Precipitation runoff from Tricouni drains into Thunder Creek. The peak is named for the tricouni which was used for traction on ice, and the approach to the peak involves traversing a glacier.

Kololo Peaks is an 8,200+ ft mountain located in the Glacier Peak Wilderness of the North Cascades in Washington state. The mountain is situated on the crest of the Cascade Range, on the shared border of Snohomish County and Chelan County, and also straddling the boundary between Mount Baker-Snoqualmie National Forest and Wenatchee National Forest. The nearest higher peak is Glacier Peak, 3.29 mi (5.29 km) to the north. Precipitation runoff and meltwater from the White River Glacier on the southeast slope drains into White River. On the west slope, the White Chuck Glacier drains into the White Chuck River, and the Suiattle Glacier and Honeycomb Glacier on the north and east sides drain into the Suiattle River. Surrounded by these glaciers, Fred Beckey in his Cascade Alpine Guide describes the mountain as being almost a nunatak.

References

1 2 3 4 "Jumbo Mountain, Washington". Peakbagger.com.
↑ Beckey, Fred W. Cascade Alpine Guide, Climbing and High Routes. Seattle, WA: Mountaineers Books, 2008.
1 2 3 Beckey, p. 15
1 2 Beckey, p. 16
1 2 3 4 Kruckeberg, Arthur (1991). The Natural History of Puget Sound Country. University of Washington Press.

External links

Jumbo Mountain weather: Mountain Forecast

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[pb-1] 1 2 3 4 "Jumbo Mountain, Washington". Peakbagger.com.

[Beckey,_Fred_W_2008-2] Beckey, Fred W. Cascade Alpine Guide, Climbing and High Routes. Seattle, WA: Mountaineers Books, 2008.

[Beckey_15-3] 1 2 3 Beckey, p. 15

[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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