Crater Lake National Park is a United States National Park located in southern Oregon.
Established in 1902, Crater Lake National Park is the fifth oldest national park in
the United States and the only one in the state of Oregon. The park encompasses the
caldera of Crater Lake, a remnant of a destroyed volcano, Mount Mazama, and the surrounding
hills and forests. The lake is 1,943 feet deep at its deepest
point, which makes it the deepest lake in the United States, the second deepest in North
America and the ninth deepest in the world. Crater Lake is often referred to as the seventh
deepest lake in the world, but this former listing excludes the approximately 3,000-foot
depth of subglacial Lake Vostok in Antarctica, which resides under nearly 13,000 feet of
ice, and the recent report of a 2,740-foot maximum depth for Lake O'Higgins/San Martin,
located on the border of Chile and Argentina. However, when comparing its average depth
of 1,148 feet to the average depth of other deep lakes, Crater Lake becomes the deepest
in the Western Hemisphere and the third deepest in the world. The impressive average depth
of this volcanic lake is due to the nearly symmetrical 4,000-foot deep caldera formed
7,700 years ago during the violent climactic eruptions and subsequent collapse of Mount
Mazama and the relatively moist climate that is typical of the crest of the Cascade Range.
The caldera rim ranges in elevation from 7,000 to 8,000 feet. The United States Geological
Survey benchmarked elevation of the lake surface itself is 6,178 feet. This National Park encompasses
183,225 acres. Crater Lake has no streams flowing into or out of it. All water that
enters the lake is eventually lost from evaporation or subsurface seepage. The lake's water commonly
has a striking blue hue, and the lake is re-filled entirely from direct precipitation in the
form of snow and rain.
Geology
Volcanic activity in this area is fed by subduction off the coast of Oregon as the Juan de Fuca
Plate slips below the North American Plate. Heat and compression generated by this movement
has created a mountain chain topped by a series of volcanoes, which together are called the
Cascade Range. The large volcanoes in the range are called the High Cascades. However,
there are many other volcanoes in the range as well, most of which are much smaller.
About 400,000 years ago, Mount Mazama began its existence in much the same way as the
other mountains of the High Cascades, as overlapping shield volcanoes. Over time, alternating layers
of lava flows and pyroclastic flows built Mazama's overlapping cones until it reached
about 11,000 feet in height. As the young stratovolcano grew, many smaller
volcanoes and volcanic vents were built in the area of the park and just outside what
are now the park's borders. Chief among these were cinder cones. Although the early examples
are gone—cinder cones erode easily—there are at least 13 much younger cinder cones
in the park, and at least another 11 or so outside its borders, that still retain their
distinctive cinder cone appearance. There continues to be debate as to whether these
minor volcanoes and vents were parasitic to Mazama's magma chamber and system or if they
were related to background Oregon Cascade volcanism.
After a period of dormancy, Mazama became active again. Then, around 5700 BC, Mazama
collapsed into itself during a tremendous volcanic eruption, losing 2,500 to 3,500 feet
in height. The eruption formed a large caldera that, depending on the prevailing climate,
was filled in about 740 years, forming a beautiful lake with a deep blue hue, known today as
Crater Lake. The eruptive period that decapitated Mazama
also laid waste to much of the greater Crater Lake area and deposited ash as far east as
the northwest corner of what is now Yellowstone National Park, as far south as central Nevada,
and as far north as southern British Columbia. It produced more than 150 times as much ash
as the May 18, 1980 eruption of Mount St. Helens.
This ash has since developed a soil type called andisol. Soils in Crater Lake National Park
are brown, dark brown or dark grayish brown sandy loams or loamy sands which have plentiful
cobbles, gravel and stones. They are slightly to moderately acidic and their drainage is
somewhat excessive. Climate
Snow is relatively rare at low elevations in western Oregon, but it is common at higher
elevations, especially at Crater Lake. Measurements at park headquarters, 6,475 feet above sea
level, show that snow falls more often here than at any other long-term weather station
in Oregon. Winter, which typically begins at the park in September and runs through
June, includes an average of 98 days with measurable snowfall. Up to 37 inches of snow
have fallen on the park in a single day, 313 inches in a month, and 903 inches in a year.
Snow typically accumulates in the park to depths of 10 to 15 feet by early spring. Most
of the park's roads remain closed through late spring, and snow lingers into the summer.
In July and August, snowfall is uncommon, and "one magnificent day typically follows
another". January is the coldest month, when highs average
about 35 °F and lows average about 18 °F. August is the warmest month, with an average
high of roughly 69 °F and an average low of about 40 °F. Between 1962 and 1990, the
highest recorded temperature was 90 °F, and the lowest was −21 °F. Annual precipitation
averages about 66 inches a year. December is the wettest, averaging about 11 inches.
Although snow covers Crater Lake National Park for eight months of the year), the lake
rarely freezes over due in part to a relatively mild onshore flow from the Pacific Ocean.
The last recorded year in which the lake froze over was in 1949, a very long, cold winter.
A 95% surface freeze occurred in 1985. The immense depth of Crater Lake acts as a heat
reservoir that absorbs and traps sunlight, maintaining the lake temperature at an average
of 55 °F on the surface and 38 °F at the bottom throughout the year. The surface temperature
fluctuates a bit, but the bottom temperature remains quite constant.
Park features
Some notable park features created by this huge eruption are:
The Pumice Desert: A very thick layer of pumice and ash leading away from Mazama in a northerly
direction. Even after thousands of years, this area is largely devoid of plants due
to excessive porosity and poor soil composed primarily of regolith.
The Pinnacles: When the very hot ash and pumice came to rest near the volcano, it formed 200-to-300-foot
thick gas-charged deposits. For perhaps years afterward, hot gas moved to the surface and
slowly cemented ash and pumice together in channels and escaped through fumaroles. Erosion
later removed most of the surrounding loose ash and pumice, leaving tall pinnacles and
spires. Other park features
Mount Scott is a steep andesitic cone whose lava came from magma from Mazama's magma chamber;
geologists call such volcano a parasitic or satellite cone. Volcanic eruptions apparently
ceased on Scott sometime before the end of the Pleistocene; one remaining large cirque
on Scott's northwest side was left unmodified by post-ice age volcanism.
In the southwest corner of the park stands Union Peak, an extinct volcano whose primary
remains consist of a large volcanic plug, which is lava that solidified in the volcano's
neck. Crater Peak is a shield volcano primarily
made of andesite and basalt lava flows topped by andesitic and dacite tephra.
Timber Crater is a shield volcano located in the northeast corner of the park. Like
Crater Peak, it is made of basaltic and andesitic lava flows, but, unlike Crater, it is topped
by two cinder cones. Rim Drive is the most popular road in the
park; it follows a scenic route around the caldera rim.
Llao Rock on the north side rises 1,800 feet above the lake, with a 1.3-mile trail from
Rim Drive leading to the summit. The Pacific Crest Trail, a 2,650-mile long
distance hiking and equestrian trail that stretches from the Mexican to Canadian borders,
passes through the park. Old-growth forests covering 50,000 acres.
History
Local Native Americans witnessed the collapse of Mount Mazama and kept the event alive in
their legends. One ancient legend of the Klamath people closely parallels the geologic story
which emerges from today's scientific research. The legend tells of two Chiefs, Llao of the
Below World and Skell of the Above World, pitted in a battle which ended up in the destruction
of Llao's home, Mt. Mazama. The battle was witnessed in the eruption of Mt. Mazama and
the creation of Crater Lake. A trio of gold prospectors: John Wesley Hillman,
Henry Klippel, and Isaac Skeeters were the first whites to visit the lake. On June 12,
1853, they stumbled upon the long, sloping mountain while hunting for provisions. Stunned
by vibrant blue color of the lake, they named the indigo body of water "Deep Blue Lake"
and the place on the southwest side of the rim where he first saw the lake later became
known as Discovery Point. But gold was more on the minds of settlers at the time and the
discovery was soon forgotten. The suggested name later fell out of favor by locals, who
preferred the name Crater Lake. William Gladstone Steel devoted his life and
fortune to the establishment and management of a National Park at Crater Lake. His preoccupation
with the lake began in 1870. In his efforts to bring recognition to the park, he participated
in lake surveys that provided scientific support. He named many of the lake's landmarks, including
Wizard Island, Llao Rock, and Skell Head. With the help of geologist Clarence Dutton,
Steel organized a USGS expedition to study the lake in 1886. The party carried the Cleetwood,
a half-ton survey boat, up the steep slopes of the mountain then lowered it to the lake.
From the stern of the Cleetwood, a piece of pipe on the end of a spool of piano wire sounded
the depth of the lake at 168 different points. Their deepest sounding, 1,996 feet, was very
close to the modern official depth of 1,932 feet made in 1953 by sonar. At the same time,
a topographer surveyed the area and created the first professional map of the Crater Lake
area.
Partly based on data from the expedition and lobbying from Steel and others, Crater Lake
National Park was established May 22, 1902 by President Theodore Roosevelt. And because
of Steel's involvement, Crater Lake Lodge was opened in 1915 and the Rim Drive was completed
in 1918. Highways were later built to the park to help
facilitate tourism. The 1929 edition of O Ranger! described access and facilities available
by then:
Crater Lake National Park is reached by train on the Southern Pacific Railroad lines into
Medford and Klamath Falls, at which stops motor stages make the short trip to the park.
A hotel on the rim of the lake offers accommodations. For the motorist, the visit to the park is
a short side trip from the Pacific and Dalles-California highways. He will find, in addition to the
hotel, campsites, stores, filling stations. The park is open to travel from late June
or July 1 for as long as snow does not block the roads, generally until October.
The lake is described in the poetry of Joaquin Miller.
Activities
There are many hiking trails inside the park, and several campgrounds. Unlicensed fishing
is allowed without any limitation of size, species, or number. The lake is believed to
have no indigenous fish, but several species of fish were introduced beginning in 1888
until all fish stocking ended in 1941. Kokanee Salmon and Rainbow Trout now thrive and reproduce
here naturally. Swimming is allowed in the lake, and the boat tours, which stop at Wizard
Island a cinder cone inside the lake, operate daily during the summer. All lake access for
people is from Cleetwood Trail, a steep walking trail, and there are no roads for cars, trucks,
or wagons that lead to the waterfront. All of the boats in the lake were delivered by
helicopter. Numerous observation points along the caldera
rim for the lake are readily accessible by automobile via the "Rim Drive", which is 33
miles long and has an elevation gain of 3,800 feet.
The highest point in Crater Lake National Park is Mount Scott at 8,929 feet. Getting
there requires a fairly steep 2.5-mile hike from the Rim Drive trailhead. On a clear day
visibility from the summit exceeds 100 miles, and one can, in a single view, take in the
entire caldera. Also visible from this point are the white-peaked Cascade Range volcanoes
to the north, the Columbia River Plateau to the east, and also the Western Cascades and
the more-distant Klamath Mountains to the west.
The scenery of Crater Lake is fully accessible during the summer months. Heavy snowfalls
in this park during the fall, winter, and spring months force many road and trail closures,
including the popular "Rim Drive", which is generally completely open from July to October,
and partially open in some other months, such as May, June, and November.
Trails
Cleetwood Cove The Cleetwood Cove trail is one of the several
walk trails that originate from the Rim Drive. It drops 700 feet from the Cleetwood Cove
parking lot. First opened during the summer of 1960 it is the only trail that accesses
directly to the lake. The trail is a little over a mile with easy slopes downhill that
may make the 11% grade climb out mildly strenuous. The trail accesses the boat dock and a rock
from which diving-jumping to the lake is common. Concessionaire tour boats provide tours around
the lake or drop off points at Wizard Island. Benches along the trail allow for an easier
climb out. Several points along the trail offer lake views. The trail is not wheelchair
accessible and may be restricted to visitors with mobility impairments.
The Watchman The Watchman trail begins from the Watchman
Overlook parking lot, built in the 1930s. The trail is 0.8 miles long and 700 feet vertical.
It is a steady uphill trail on an isolated mountain on the west rim of the crater, with
several switchbacks, providing some of the more breathtaking views of Crater Lake and
Wizzard Lake. Other neighboring landmarks are visible at the top of the trail, including
Mount McLoughlin, Mount Thielsen, Union Peak, Mount Scott and the Klamath Basin. The trail
ends next to a historic fire lookout tower, built in 1932, similar to the one atop Mount
Scott, on the opposite side of the crater. Lightning Spring
The Lightning Spring trail starts from the Lightning Spring picnic area. It is a 3⁄4-mile
hike with an elevation gain of 250 feet. The trail circles around several meadows up to
the Lightning Spring creek. The trail is known for the frequent sights of gazing deer.
Castle Crest Wildflower Garden This is considered to be the easiest trail,
looping around the Castle Crest Wildflower Garden. It starts from the East Rim Road,
near the park's headquarters. It received its name because of a large stretch of meadows
around which the trail circles and which is bursting with wildflowers in the springtime.
The trail is about 1⁄2 mile before it reaches the wildflower meadow garden, from which other
improvised routes depart. Plaikni Falls
The Plaikni Falls trail is the newest trail on the Crater Lake park. It stretches 1.1
miles from the trailhead located 1.2 miles south from the Phantom Ship Overlook on Pinnacles
Road, which spins off Rim Drive. The trail leads to the Plaikni Falls. Most of the trail
is Wheelchair accessible. The final stretch is fairly uphill, which may provide moderately
challenging. Garfield Peak
The Garfield Peak trail is a moderately challenging 1.7-mile hike to Garfield Summit. The trailhead
is located east of the Crater Lake Lodge and gains approximately 1,000 feet of elevation.
Several spots along the trail provide viewpoints overlooking the Phantom Ship island and Dutton
Cliff. A few viewpoints offer unique views of Wizzard island. The trail is popular in
the late afternoon on account of unique shifting colors over the lake and its surroundings.
See also
List of nationally protected areas of the United States
National Park Service Rustic about the architecture of the park structures
National Register of Historic Places listings in Crater Lake National Park
Volcanic Legacy Scenic Byway References
Works cited Taylor, George H., and Hannan, Chris. The
Climate of Oregon: From Rain Forest to Desert. Corvallis: Oregon State University Press.
ISBN 0-87071-468-6. "Crater Lake National Park". Crater Lake Institute.
Affiliated with Crater lake National Park or the National Park Service. Retrieved 11
June 2014. Further reading
External links "Crater Lake National Park". National Park
Service. Retrieved 2008-11-09. "Crater Lake, Oregon". Earth Observatory.
NASA. Retrieved 2008-11-09. "Crater Lake National Park Trust". Retrieved
2008-11-09. "Crater Lake Digital Research Collection".
Oregon Institute of Technology. Retrieved 2009-11-12.