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Mono Lake

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Eastern Sierra : Mono Lake
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Mono Lake [1] is in Eastern Sierra region of California in the United States, just east of Yosemite National Park.

Understand

History

Starting in 1941 the streams that fed Mono Lake were diverted for use by the city of Los Angeles. With a yearly evaporation rate of 45 inches (nearly four feet) the lake level quickly dropped, going from an elevation of 6,417 feet above sea level to a low point of 6,372 feet above sea level. The accompanying 31% loss of surface area and 50% loss of water volume had a devastating effect on the estimated two million birds that used the lake each year, as well as causing air quality problems due to the dust from the now-exposed lakebed. In 1994 a court ordered that the lake be returned to a level of 6,392 feet above sea level, but due to droughts in the region the current (2008) level is still only 6,382 feet above sea level.

Landscape

The lake is believed to have formed 760,000 years ago, although it may be a remnant of a larger lake that formed 1-3 million years ago, thus making it one of the oldest lakes in North America. It is a saline lake with no outlets, fed solely by runoff from the surrounding mountains. One unusual feature of the lake is its many tufa rock formations. These rock towers form when underwater springs rich in calcium mix with the waters of the lake, which are rich in carbonates. The resulting reaction forms limestone. Over time the buildup of limestone forms a tower, and with the drop in lake level the towers have become exposed.

Flora and fauna

Mono Lake is a noted birdwatching destination. Brine shrimp and brine fly larva in the water and brine flies on the shorelines provide abundant food for hungry migrants that stopover to refuel before moving on. Additionally, despite the fact that Negit Island has become land-bridged (and thus accessible to predators) due to lake level decrease, the area's islands remain important breeding areas for birds. Approximately 85% of the state's population of California gulls cross the Sierras each year to breed here, as well as a significant portion of the state's snowy plovers. In addition, between 1.5 to 2 million eared grebes use the lake during migration each year, as well as 80,000 Wilson's phalaropes, 60,000 red-necked phalaropes, and nearly 80 other species of waterbirds.

The lake's food chain begins with algae that bloom in summer months. This algae becomes food for the 4-6 trillion brine shrimp that inhabit the lake, as well as the brine flies that gather on the shoreline. In summer months these flies rise up in black clouds when approached, although luckily they aren't biting insects and thus are not a nuisance to humans.

Climate

With little more than desert scrub in the basin, there is no shelter from the elements.

Winds routinely rip through the basin in all seasons. Choking alkali dust clouds can be lifted out of basin by the winds. Usually, the wind direction sends these clouds out to the east away from the most visited parts, but there's no guarantee that the direction won't change and provide you with a much more intimate opportunity to study the clouds firsthand.

In winter, snow occasionally covers the ground. Chains may be required to get around the basin, and are frequently required to cross the passes to get in and out of the region. State Route 120 is closed just west of US 395 all winter (and often all spring), and is closed east of the South Tufa area for much of the winter too.

In summer, if the wind stops suddenly, a cold day can suddenly turn into a scorcher.

Get in

Fees/Permits

There are no fees charged to visit Mono Lake.

Get around

See

  • Mono Lake Tufa SNR, [2]. The state reserve includes areas of the lake with the largest tufa towers. The section of the reserve located below the Mono County Park offers a boardwalk featuring interpretive information. Free.

Do

Buy

Eat

There is a very popular restaurant at the corner of highway 120 and 395 that is part of a Mobile Gas station. Given the remoteness it is quite nice and recently remodeled. On a weeknight expect to see as many as 30 other diners enjoying the views overlooking the lake. Food is standard grill fare, and due to the somewhat limited off-season options this stop may be the best bet in the area.

Drink

Sleep

Since this is a preserve, no camping is permitted anywhere within the Mono Lake Scenic Area.

Lodging

Lodging is available within the city of Lee Vining, some of which overlook the lake.

Camping

  • Big Bend Campground, (take SR120 west from US395, then left onto Poole Power Plant Road which leads up the canyon to the campground). In a stand of trees next to the creek in Lee Vining canyon. Several other campgrounds are in the same canyon. $15/night.

Stay safe

Get out

  • Lee Vining. Located along the lake shore, this town offers services and information about the lake.
  • Yosemite National Park. The Tioga Pass entrance to the park is located just south of the lake, but is closed from the first snow until the roads can be cleared in the Spring (usually around May).


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