Bear Lake (Idaho–Utah)
The lake's unique aquamarine color is due to
the reflection of suspended limestone
|Location||Bear Lake County, Idaho
Rich County, Utah, U.S.
|Primary inflows||Bear River
Creeks: Fish Haven,
North Eden, South Eden,
Swan Creek, St. Charles
|Primary outflows||Bear Lake Outlet Canal|
|Catchment area||5,862,957 acres (23,727 km2)|
|Basin countries||United States|
|Max. length||18.3 mi (29.5 km)|
|Max. width||7.1 mi (11.4 km)|
|Surface area||109 sq mi (280 km2)|
|Average depth||94 ft (29 m)|
|Max. depth||208 ft (63 m)|
|Water volume||6,500,000 acre·ft (8.02 km3)|
|Residence time||19.6 years|
|Shore length1||48 mi (77 km)|
|Surface elevation||5,924 ft (1,806 m)|
|Settlements||Garden City, Utah,
Fish Haven, Idaho
1 Shore length is not a well-defined measure.
Bear Lake is a natural freshwater lake on the Utah-Idaho border in the Western United States. It is the second largest natural freshwater lake in Utah and has been called the "Caribbean of the Rockies" for its unique turquoise-blue color, which is due to the reflection of "limestone deposits suspended in the lake." Its water properties have led to the evolution of several unique species of fauna that occur only within the lake. Bear Lake is over 250,000 years old. It was formed by fault subsidence that continues today, slowly deepening the lake along the eastern side.
Originally named "Black Bear Lake" by Donald Mackenzie, an explorer for the North West Fur Company who discovered the lake in 1819, the name was later changed to Bear Lake. The lake is a popular destination for tourists and sportsmen and the surrounding valley has gained a reputation for having high quality raspberries.
The first known inhabitants of the Bear Lake Valley were Shoshone tribes, but the area was known to many Native Americans. The first record of whites seeing the lake is from 1818 when French-Canadian trappers working for the North West Company followed the Bear River upstream to the valley.
The south end of the lake, in the area of modern day Laketown, was the location of a rendezvous in the summer of 1827 and 1828. Mountain men, including Jedediah Smith and Jim Bridger, gathered at this location, along with trade goods suppliers, and American Indians from several different tribes. The mountain men and Indians sold their furs in exchange for various store goods and supplies, and several weeks were spent reveling in assorted amusements and liquor.
Although the lake lies relatively near the Oregon Trail, which runs north and east of the lake, and was traveled by many pioneers between 1836 and the 1850s, it seems none of them went south enough to view the lake. It wasn't until 1863 that Mormon pioneers led by Charles C. Rich settled in the Bear Lake Valley, but they made an agreement with Native Americans which left most of the Utah portion of the valley in Indian possession. The Mormons gradually moved south and established the villages of Garden City, Pickelville, and Laketown, each along the lake's shore.
In later years, Bear Lake became a resort and recreation area, with many developers selling lake shore and mountain view lots. The beaches of Lakota and Ideal were given to private development in the 1970s, including the Blue Water and Sweetwater developments. The State of Utah bought the far southeast beach for use as a State Park, and also operates a marina on the lake's west side.
Environmental concerns have arisen with the ongoing development of the area. The lake is diked on the Idaho side and downstream Bear River water users use it as a reservoir.
Formed in a half graben valley straddling the Idaho-Utah border, the lake has an approximate area of 109 square miles (282 km²) and sits at an elevation of 5,924 feet (1,806 m) along the northeast side of the Wasatch Range and the east side of the Bear River Mountains.
The lake and surrounding areas are a popular summer tourist destination. The lake has many marinas, beaches, and two tourist towns in Utah, Garden City, and Laketown. It also has two state parks, each named Bear Lake State Park: one in Idaho, one in Utah.
Bear Lake has a high rate of endemism (species living naturally only in one place). Several species evolved in the lake's waters, but after the diversion of the Bear River into the lake, many of these have gone extinct. Remaining known endemic species of fish include the Bonneville cisco, Bonneville whitefish, Bear Lake whitefish, and Bear Lake sculpin. There have been attempts to transplant these species to other areas without success. "The Bonneville cisco eat only small aquatic invertebrates or zooplankton. They are eaten by larger fish in the lake including cutthroat trout, lake trout, and whitefish". Although other species have been introduced into the lake, few can reproduce successfully in the lake's waters, so it has not been affected as greatly as other lakes by invasive species.
Water from the lake is used for irrigation in the nearby Bear Valley in southeast Idaho, and for recreational fishing. The lake drains via the Bear River Outlet, completed in 1915 into the Bear River which eventually flows into the northeast portion of Great Salt Lake.
The climate in the valley is warm and dry during the summer, with first snowfall coming during the fall. Fog and snow are common during the winter. The lake is icebound during most winters and most of spring during freeze years.
Many locals from northern Utah, southern Idaho, and western Wyoming come to Bear Lake for summer vacations due to its proximity and abundance of recreational activities.
On the east side of the lake, Boy Scouts may take part in the Bear Lake Aquatics Base camp for one week from June through August.
Raspberry Days festival 
Bear Lake has become famous for the surrounding valley's crops of raspberries and for the annual Raspberry Days festival held in Garden City to celebrate the harvest of raspberries, generally during the first week of August. This event is said to bring thousands of people from all over the world and features rodeos, parades, fireworks, dances, a craft fair, "Miss Berry Princess contest", raspberry recipe cookoff, a talent show, fun run and concerts.
See also 
- Bear Lake history & facts. Utah Division of Wildlife Resources.
- Bear Lake State Park. Utah.com
- Bear Lake Geological Background: Endemism. U.S. Geological Survey.
- See Rosenbaum and Kaufman, 2009
- Bear Lake Geological Background: Tectonism U.S. Geological Survey.
- Bear Lake State Park: In Depth. Utah State Parks and Recreation.
- Bear Lake Raspberry Days. Utah Outdoor Activities.
- "Mountain Men and Life in the Rocky: Rendezvous".
- Eddins, Ned O. "Mountain Man Rendezvous Sites".
- Bear Lake. Utah Division of Water Quality.
- "Bonneville Cisco".
- Bear Lake Raspberry Days. The Logan Library.
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