Olympic National Park, State of Washington, USA

Olympic National Park is an American national park located in the State of Washington, on the Olympic Peninsula. The park has four regions: the Pacific coastline, alpine areas, the west side temperate rain forest and the forests of the drier east side. Within the park there are three distinct ecosystems which are sub alpine forest and wildflower meadow, temperate forest, and the rugged Pacific coast.

President Theodore Roosevelt originally designated Mount Olympus National Monument on 2 March 1909. The monument was redesignated as a national park by Congress and President Franklin Roosevelt on June 29, 1938. In 1976, Olympic National Park was designated by UNESCO as an International Biosphere Reserve, and in 1981 as a World Heritage Site. In 1988, Congress designated 95 percent of the park as the Olympic Wilderness.

The coastal portion of the park is a rugged, sandy beach along with a strip of adjacent forest. It is 60 miles (97 km) long but just a few miles wide, with native communities at the mouths of two rivers. The Hoh River has the Hoh people and at the town of La Push at the mouth of the Quileute River live the Quileute. The beach has unbroken stretches of wilderness ranging from 10 to 20 miles. While some beaches are primarily sand, others are covered with heavy rock and very large boulders. Bushy overgrowth, slippery footing, tides and misty rain forest weather all hinder foot travel. The coastal strip is more readily accessible than the interior of the Olympics; due to the difficult terrain, very few backpackers venture beyond casual day-hiking distances.

The most popular piece of the coastal strip is the 9-mile Ozette Loop. The Park Service runs a registration and reservation program to control usage levels of this area. From the trailhead at Ozette Lake, a 3-mile (4.8 km) leg of the trail is a boardwalk-enhanced path through near primal coastal cedar swamp. Arriving at the ocean, it is a 3-mile walk supplemented by headland trails for high tides. This area has traditionally been favored by the Makah from Neah Bay. The third 3-mile leg is enabled by a boardwalk which has enhanced the loop's visitor numbers.

There are thick groves of trees adjacent to the sand, which results in chunks of timber from fallen trees on the beach. The mostly unaltered Hoh River, toward the south end of the park, discharges large amounts of naturally eroded timber and other drift, which moves north, enriching the beaches. The removal of driftwood – logs, dead-heads, tops and root-wads from streams and beaches was a major domestication measure across North America. Even today driftwood deposits form a commanding presence, biologically as well as visually, giving a taste of the original condition of the beach viewable to some extent in early photos. Drift-material often comes from a considerable distance; the Columbia River formerly contributed huge amounts to the Northwest Pacific coasts.

The smaller coastal portion of the park is separated from the larger, inland portion. President Franklin D. Roosevelt originally had supported connecting them with a continuous strip of park land. The park is known for its unique turbidites. It has very exposed turbidities with white calcite veins. Turbidites are rocks or sediments that travel into the ocean as suspended particles in the flow of water, causing a sedimentary layering effect on the ocean floor. Over time the sediments and rock compact and the process repeats as a constant cycle. The park also is known for its tectonic mélanges that have been deemed 'smell rocks' by the locals due to its strong petroleum odor. Mélanges are large individual rocks that are large enough that they are accounted for in map drawings. The Olympic mélanges can be as large as a house.

Within the center of Olympic National Park rise the Olympic Mountains whose sides and ridgelines are topped with massive, ancient glaciers. The mountains themselves are products of accretionary wedge uplifting related to the Juan De Fuca Plate subduction zone. The geologic composition is a curious mélange of basaltic and oceanic sedimentary rock. The western half of the range is dominated by the peak of Mount Olympus, which rises to 7,965 feet (2,428 m). Mount Olympus receives a large amount of snow, and consequently has the greatest glaciation of any non-volcanic peak in the contiguous United States outside of the North Cascades. It has several glaciers, the largest of which is Hoh Glacier at 3.06 miles (4.93 km) in length. Looking to the east, the range becomes much drier due to the rain shadow of the western mountains. Here, there are numerous high peaks and craggy ridges. The tallest summit of this area is Mount Deception, at 7,788 feet.

The western side of the park is mantled by temperate rain-forests, including the Hoh Rain-forest and Quinault Rain-forest, which receive annual precipitation of about 150 inches (380 cm), making this perhaps the wettest area in the continental United States.

As opposed to tropical rain-forests and most other temperate rainforest regions, the rainforests of the Pacific Northwest are dominated by coniferous trees, including Sitka Spruce, Western Hemlock, Coast Douglas-fir and Western redcedar. Mosses coat the bark of these trees and even drip down from their branches in green, moist tendrils. Valleys on the eastern side of the park also have notable old-growth forest, but the climate is notably drier. Sitka Spruce is absent, trees on average are somewhat smaller, and undergrowth is generally less dense and different in character. Immediately northeast of the park is a rather small rainshadow area where annual precipitation averages about 16 inches.

The park also provides habitat for many species that are native only to the Pacific Northwest coast. As a result, scientists have declared it a biological reserve and study its unique species to better understand how plants and animals evolve. The park is home to sizable populations of black bears and black-tailed deer. The park also has a noteworthy cougar population, numbering about 150. Mountain goats were accidentally introduced into the park into the 1920s and have caused much damage on the native flora. The NPS has activated management plans to control the goats.The park contains an estimated 366,000 acres of old-growth forests. Forest fires are infrequent in the rainforests of the park's western side; however, a severe drought after the driest spring in 100 years, coupled with an extremely low snowpack from the preceding winter, resulted in a rare rainforest fire in the summer of 2015.

There are several roads in the park, but none penetrate far into the interior. The park features a network of hiking trails, although the size and remoteness means that it will usually take more than a weekend to get to the high country in the interior. The sights of the rain forest, with plants run riot and dozens of hues of green, are well worth the possibility of rain sometime during the trip, although months of July, August and September frequently have long dry spells. An unusual feature of ONP is the opportunity for backpacking along the beach. The length of the coastline in the park is sufficient for multi-day trips, with the entire day spent walking along the beach. Although idyllic compared to toiling up a mountainside, one must be aware of the tide; at the narrowest parts of the beaches, high tide washes up to the cliffs behind, blocking passage. There are also several promontories that must be struggled over, using a combination of muddy steep trail and fixed ropes.

During winter, the viewpoint known as Hurricane Ridge offers numerous winter sports activities. The Hurricane Ridge Winter Sports Club operates Hurricane Ridge Ski and Snowboard Area, a not for profit alpine ski area which offers ski lessons, rentals, and inexpensive lift tickets. The small alpine area is serviced by two rope tows and one poma lift. A large amount of backcountry terrain is accessible for skiers, snowboarders, and other backcountry travelers when the Hurricane Ridge Road is open. Winter access to the Hurricane Ridge Road is currently limited to Friday through Sunday weather permitting. The Hurricane Ridge Winter Access Coalition is a community effort to restore seven-day-a-week access via the Hurricane Ridge Road. Rafting is available on both the Elwha and Hoh Rivers. Boating is common on Ozette Lake, Lake Crescent, and Lake Quinault.

For more information  - Olympic National Park