Trask Mountain | |
---|---|
Highest point | |
Elevation | 3,426 ft (1,044 m) NAVD 88 [1] |
Prominence | 3,424 ft (1,044 m) [2] |
Listing | Oregon county high points |
Coordinates | 45°22′16″N123°27′21″W / 45.371236781°N 123.455773206°W [1] |
Geography | |
Location | Yamhill County, Oregon, U.S. |
Parent range | Northern Oregon Coast Range |
Topo map | USGS Trask Mountain |
Climbing | |
Easiest route | Trask Toll Road to just below the summit. [3] |
Trask Mountain in the Northern Oregon Coast Range, is the tallest mountain in Yamhill County, Oregon. [4] It is located in the northwest corner of the county. [5] Evidently the mountain was named for Elbridge Trask who settled west of the peak in Tillamook County in 1852.
The mountain is composed of mainly volcanic rock with some sedimentary rocks. [6] Like much of the northern section of the Oregon Coast Range, the origins began around 40 million years ago during the Eocene period. During this era, sandstone and siltstone formed in the area. [7] Additionally, igneous rocks and basalt flows combined with basaltic sandstone to create many of the mountainous formations. The volcanic rocks come from basalt flows that originated from fissures in the central portion of Oregon and covered much of the state. [8] Additional sedimentary rock was formed more recently, around 20 million years ago. [7]
All of the coast range lies over a convergent tectonic margin interacting with the Juan de Fuca Plate that is subducting beneath North America tectonic plate in the Cascadia subduction zone. [9] The mountains are created by the plunging structural arch of sedimentary and Tertiary volcanic strata that is being uplifted. [8]
Vegetation in the area includes Sitka spruce, Douglas-fir, western hemlock, western redcedar, salmonberry, red alder, western sword fern, and vine maple among many others. [10] Other plant life native to the mountains are Coptis laciniata , salal, Oregon-grape, and bracken fern. [11] [12] [13]
Different insects can include spiders, beetles, and various centipedes. [11] [13] Mammals include weasels, chipmunks, black bears, hares and deer. [11] Birds include kinglets, chickadees, woodpeckers, and jays. [11]
In the northwest part of the county, the mountain is in private forest land owned by Weyerhaeuser. [14] Trask Mountain makes up a portion of the North Yamhill River headwaters that drain to the Willamette River. [6] On its north side, drainage is to the Trask River which flows west to the Pacific Ocean. [10] The mountain receives over 135 inches (3,400 mm) of precipitation each year. [6] The mountain is home to a U.S. Geologic Survey seismograph station that was installed in 1991. [15] Previously, the peak was home to a fire lookout station that was abandoned in the 1970s. [16] There are plans to construct a 50 Megawatt wind power facility atop the mountain beginning in 2009. [17]
In 1997, Dundee, Oregon, resident Lee John Knoch beat Robert Allen Holliday nearly to death and buried him alive on Trask Mountain. [18]
The North Yamhill River is a 31-mile (50 km) tributary of the Yamhill River in the U.S. state of Oregon. It drains an area of the Northern Oregon Coast Range, as well as part of the Willamette Valley west of the Willamette River.
The South Yamhill River is a tributary of the Yamhill River, approximately 60 miles (97 km) long, in northwest Oregon in the United States. It drains an area of the Northern Oregon Coast Range, as well as part of the Willamette Valley west of the Willamette River.
The Salmon River flows from the Central Oregon Coast Range to the Pacific Ocean coast of northwest Oregon in the United States. About 24 miles (39 km) long, it begins and ends in Lincoln County but also flows briefly through western Polk and southern Tillamook counties. Much of its course lies within the Siuslaw National Forest.
The Trask River is in northwestern Oregon in the United States. It drains a mountainous timber-producing area of the Northern Oregon Coast Range west of Portland into Tillamook Bay and the Pacific Ocean. It is one of five rivers—the Tillamook, the Trask, the Wilson, the Kilchis, and the Miami—that flow into the bay.
The Wilson River, about 33 miles (53 km) long, flows from the Northern Oregon Coast Range to Tillamook Bay in the U.S. state of Oregon. Formed by the confluence of its Devil's Lake Fork and its South Fork, it runs generally west through the Tillamook State Forest to its mouth near the city of Tillamook. It is one of five rivers—the Tillamook, the Trask, the Wilson, the Kilchis, and the Miami—that flow into the bay.
The Tillamook River is a stream, about 17 miles (27 km) long, near the coast of northwest Oregon in the United States. It drains an oceanside valley in the foothills of the Northern Oregon Coast Range west of Portland and empties into the Pacific Ocean via Tillamook Bay. It is one of five rivers—the Tillamook, the Trask, the Wilson, the Kilchis, and the Miami—that flow into the bay.
The Calapooya Mountains are a mountain range in Lane and Douglas counties of southwestern Oregon in the United States. The range runs for approximately 60 miles (97 km) west from the Cascade Range between Eugene on the north and Roseburg on the south.
Mount Hebo is a mountain located on the border of Tillamook County and Yamhill County in the U.S. state of Oregon. Mount Hebo is known for being one of the best, most easily accessed viewpoints in the north Oregon Coast, with a 360-degree view from the summit.
Diamond Peak is a volcano in Klamath and Lane counties of central Oregon in the United States. It is a shield volcano, though it might also be considered a modest stratocone. Diamond Peak forms part of the Cascade Volcanic Arc, a segment of the Cascade Range in western North America extending from southern British Columbia through Oregon to Northern California. Reaching an elevation of 8,748 feet (2,666 m), the mountain is located near Willamette Pass in the Diamond Peak Wilderness within the Deschutes and Willamette national forests. Surrounded by coniferous forest and visible in the skyline from foothills near Eugene, Diamond Peak offers a few climbing routes and can be scrambled. Diamond Peak is one of Oregon's Matterhorns.
Yamsay Mountain is a large shield volcano in the Cascade Range of south-central Oregon, located about 35 miles (56 km) east of Crater Lake on the border between Klamath County and Lake County. It is part of the Cascade Volcanic Arc but is located in a mountain range 30 to 50 miles behind the main Cascade volcanic front. The best known members of this enigmatic arc are the massive shields of Newberry Volcano, about 55 miles (89 km) farther north in Oregon, and Medicine Lake Volcano, about 80 miles (130 km) south in Northern California. Yamsay is the second highest volcano in the eastern arc, almost 300 feet (90 m) higher than Newberry and Medicine Lake.
Saddle Mountain is the tallest mountain in Clatsop County in the U.S. state of Oregon. Part of the Oregon Coast Range, Saddle Mountain is in Saddle Mountain State Natural Area in the northwest corner of Oregon. The peak is listed on Oregon's Register of Natural Heritage Resources.
South Saddle Mountain is the tallest mountain in Washington County, Oregon, United States. Part of the Oregon Coast Range, the peak is located in the Tillamook State Forest in the northwest section of the state of Oregon. It is the eighth-highest peak of the Oregon Coast Range.
The Northern Oregon Coast Range is the northern section of the Oregon Coast Range, in the Pacific Coast Ranges physiographic region, located in the northwest portion of the state of Oregon, United States. This section of the mountain range, part of the Pacific Coast Ranges, contains peaks as high as 3,710 feet (1,131 m) for Rogers Peak. Forests in these mountains are considered to be some of the most productive timber land in the world. The Central Oregon Coast Range is directly south of this section with the Southern Oregon Coast Range beyond the central range.
Rogers Peak is the highest mountain in Tillamook County, Oregon. Located in the Tillamook State Forest, the peak is also the highest peak in the Northern Oregon Coast Range, which is the northern section of the Oregon Coast Range.
The Central Oregon Coast Range is the middle section of the Oregon Coast Range, in the Pacific Coast Ranges physiographic region, and located in the west-central portion of the state of Oregon, United States roughly between the Salmon River and the Umpqua River and the Willamette Valley and the Pacific Ocean. This approximately 90-mile (140 km) long mountain range contains mountains as high as 4,097 feet for Marys Peak. Portions of the range are inside the Siuslaw National Forest and three wilderness areas exist as well: Drift Creek Wilderness, Cummins Creek Wilderness and Rock Creek Wilderness.
The Oregon Coast Range, often called simply the Coast Range and sometimes the Pacific Coast Range, is a mountain range, in the Pacific Coast Ranges physiographic region, in the U.S. state of Oregon along the Pacific Ocean. This north-south running range extends over 200 miles (320 km) from the Columbia River in the north on the border of Oregon and Washington, south to the middle fork of the Coquille River. It is 30 to 60 miles wide and averages around 1,500 feet (460 m) in elevation above sea level. The coast range has three main sections, a Northern, Central, and Southern.
The Siletz River Volcanics, located in the Oregon Coast Range, United States, are a sequence of basaltic pillow lavas that make up part of Siletzia. The basaltic pillow lavas originally came from submarine volcanoes that existed during the Eocene.
Scoggins Creek, formerly known as "Scoggin Creek", is a 19-mile (31 km) tributary of the Tualatin River in Tillamook and Washington counties in the U.S. state of Oregon. It is named for pioneer settler Gustavus Scoggin.
Willamina Creek is a tributary, about 20 miles (32 km) long, of the South Yamhill River in the U.S. state of Oregon. Beginning in the Northern Oregon Coast Range in Yamhill County, it briefly enters and exits a small part of eastern Tillamook County, then flows generally south to meet the larger stream at Willamina, near the border with Polk County.
The Willamette Lowland basin-fill aquifer is 31,000 km2, 12,000 square mile aquifer underlying the region of Oregon and parts of Washington (state) between the Oregon Coast Range and the Cascade Range. The aquifer shares a name with the local river, the Willamette River, originating from a Clackamas Chinook word. The "mette" of Willamette was used by the Clackamas to mean water or river. The Willamette valley is home to 70% of Oregon's population, with the aquifer supplying water for agricultural, domestic, and industrial purposes. Reported in 2005, the total water use from the aquifer was 1.6 hm3 per day, with 58% going to irrigation, 24% to public supply, and 18% to industrial use. In general, the aquifer withdraw is sufficiently compensated in the long term by recharge through precipitation, however regions of the aquifer have shown long term declines, including that regions underlain by the Columbia River basalt unit. However, during the dry season from June-September, withdrawals from the aquifer result is significant seasonal variations in the ground water table height, changing by more than 60 ft. In the state of Oregon, all water is publicly owned and maintenance and protection of water is done by the Oregon Water Resources Department and the Oregon Water Resources Commission. However, local governments can provide land use permits for aquifer use, notably, use for new rural residences.
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