Emerald Pool

Emerald Pool is a small, shallow lake, with an area of less than one acre. It is located about 80 meters above Vernal Fall in Yosemite National Park. It is named for its deep green color, which is caused by algae 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 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 since waders or swimmers have been swept over Vernal Fall and killed, and people sliding down Silver Apron risk collision with hidden rocks at its lower end.{{cite web|url=https://www.nps.gov/yose/planyourvisit/halfdome.htm|title=Entering Emerald Pool and the Silver Apron is prohibited|work=Yosemite National Park|publisher=U.S. National Park Service}}{{cite news|url=http://latimesblogs.latimes.com/lanow/2011/07/chain-reaction-rescue-killed-three-at-yosemite.html|title=Chain-reaction rescue killed three at Yosemite | work=Los Angeles Times}} This prohibition is clearly marked with signs.

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There also is an Emerald Pools destination in California along the Yuba River.{{cite web |last1=Marguiles |first1=Alex |title=Exploring Our Backyard: Emerald Pools is a hidden gem gaining popularity |url=http://nevadasportsnet.com/news/reporters/exploring-our-backyard-emerald-pools-is-a-hidden-gem-gaining-popularity |website=NSN, Nevada Sports Net |date=18 June 2020 |publisher=Sinclair Broadcast Group, Inc. |accessdate=1 Sep 2020}} {{Coord|39.3213|N|120.6558|W|display=inline}} The South Yuba River flows down a {{convert|60|ft|m}} waterfall into a sheer rock canyon with two pools. The walls around the first pool measure from around {{convert|30|ft|m}} to {{convert|80|ft|m}} in height with a length of around {{convert|50|m|ft}} and width of around {{convert|30|m|ft}}. The crystal-clear water is deep, {{convert|27|ft|m}} near the middle of the pool, and many people jump off the cliffs for enjoyment. A second pool nearby is nearly as large. Despite the cool water temperature it is a popular swimming spot, particularly among young adults.{{citation needed|date=September 2020}}

Emerald Pool, a hot spring named for its emerald green color, is one of the main attractions at Black Sand Basin in Yellowstone National Park. Its temperature is {{Convert|154.6|F}} and its dimensions are {{Convert|27 by 38|ft}} with a depth of {{Convert|25|ft}}. The color is due to growth of yellow bacteria and algae. Cooling, the result of objects thrown into the pool and natural debris, has affected the growth of the bacteria and algae, making the pool appear orange and brown around the edges.[http://www.yellowstonenationalpark.com/blacksand.htm Geysers - Black Sand], Yellowstone National Park

Other locations named Emerald Pool are in Morne Trois Pitons National Park in Dominica, and in Zion National Park in Utah.

• List of lakes in California

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{{Coord|37.72734|N|119.54236|W|source:placeopedia_region:US-CA_type:waterbody|display=title}}

Category:Lakes of Mariposa County, California

Category:Lakes of Yosemite National Park

Category:Geothermal features of Yellowstone National Park

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