Emerald Pool
Encyclopedia
Emerald Pool is the name of several locations.

Yosemite

Emerald Pool is a small, shallow lake located immediately above Vernal Fall in Yosemite National Park
Yosemite National Park
Yosemite National Park is a United States National Park spanning eastern portions of Tuolumne, Mariposa and Madera counties in east central California, United States. The park covers an area of and reaches across the western slopes of the Sierra Nevada mountain chain...

. It is named for its deep green color, which is caused by algae
Algae
Algae are a large and diverse group of simple, typically autotrophic organisms, ranging from unicellular to multicellular forms, such as the giant kelps that grow to 65 meters in length. They are photosynthetic like plants, and "simple" because their tissues are not organized into the many...

 living on the rocks at the bottom of the pool. In the summertime during diminished water flow, the Silver Apron (a smooth granite slope over which the Merced River
Merced River
The Merced River , in the central part of the U.S. state of California, is a -long tributary of the San Joaquin River flowing from the Sierra Nevada into the Central Valley. It is most well known for its swift and steep course through the southern part of Yosemite National Park, and the...

 flows into the Emerald Pool) is frequently (albeit illegally) used by hikers as a water slide. Swimming or wading in the Emerald Pool or entering the Silver Apron is prohibited by the National Park Service as waders or swimmers have been swept over Vernal Fall. This prohibition is clearly marked with signs.

Yuba River

There also is an Emerald Pool in Northern California
California
California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...

 along the Yuba River
Yuba River
The Yuba River is a tributary of the Feather River in the Sacramento Valley of the U.S. state of California. It is one of the Feather's most important branches, providing about a third of its flow. The main stem of the river is about long, and its headwaters are split into North, Middle and South...

. The Yuba River flows down a canyon then falls down a water fall into a shear rock canyon around 60 feet. The walls around the first pool measure from around 30 feet to 80 feet in height with a length of around 50 meters and a width of around 30 meters, the depth is around 7–10 meters, the water is crystal clear and many people jump off the cliffs for enjoyment. There is a second pool nearby, not as big, but close. It is popular with young adults from Reno and Grass Valley areas. It is a popular swimming spot although the water is cool.

Others

Other locations named Emerald Pool are in Morne Trois Pitons National Park
Morne Trois Pitons National Park
Morne Trois Pitons National Park is a World Heritage Site located in the Caribbean island of Dominica. This area was established as a national park by the Dominican government in July 1975, the first to be legally established in the country...

, in Dominica
Dominica
Dominica , officially the Commonwealth of Dominica, is an island nation in the Lesser Antilles region of the Caribbean Sea, south-southeast of Guadeloupe and northwest of Martinique. Its size is and the highest point in the country is Morne Diablotins, which has an elevation of . The Commonwealth...

; in Yellowstone National Park
Yellowstone National Park
Yellowstone National Park, established by the U.S. Congress and signed into law by President Ulysses S. Grant on March 1, 1872, is a national park located primarily in the U.S. state of Wyoming, although it also extends into Montana and Idaho...

; and in Zion National Park
Zion National Park
Zion National Park is located in the Southwestern United States, near Springdale, Utah. A prominent feature of the park is Zion Canyon, which is 15 miles long and up to half a mile deep, cut through the reddish and tan-colored Navajo Sandstone by the North Fork of the Virgin River...

 in Utah
Utah
Utah is a state in the Western United States. It was the 45th state to join the Union, on January 4, 1896. Approximately 80% of Utah's 2,763,885 people live along the Wasatch Front, centering on Salt Lake City. This leaves vast expanses of the state nearly uninhabited, making the population the...

.
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