Tag Archive: Lake Bonneville

Old Wooden Pipeline on Dried Out Great Salt Lake – Utah

Old Wooden Pipeline on Dried Out Great Salt Lake - Utah

An old wood pipeline stretches across a dried up section of the Great Salt Lake, in the state of Utah, along the Wasatch Front.

The Great Salt Lake a remnant of the much larger prehistoric Lake Bonneville, which once covered much of present-day Utah, Nevada, and Idaho during the Ice Age. Around 14,500 years ago, Lake Bonneville was a massive freshwater lake, reaching depths of over 1,000 feet and covering an area nearly the size of modern Lake Michigan. A dramatic event known as the Bonneville Flood occurred when the lake overflowed near present-day Red Rock Pass in Idaho, sending vast amounts of water into the Snake River and drastically lowering its levels. Over time, as the climate warmed and precipitation patterns shifted, the lake gradually evaporated, leaving behind smaller bodies of water, including the Great Salt Lake, Utah Lake, and Sevier Lake.

Today, the Great Salt Lake is the largest saltwater lake in the Western Hemisphere, and has been a vital geographic and economic feature of Utah for centuries. Indigenous peoples, including the Ute and Shoshone, lived around the lake long before European settlers arrived. In the 19th century, Mormon pioneers used the lake’s resources for salt harvesting and industry, while the construction of railroads and mineral extraction further shaped its economic role. Over time, the lake became an important habitat for millions of migratory birds, a hub for recreation, and a critical part of Utah’s ecosystem. However, human water consumption and climate fluctuations have drastically altered its size and health.

Climate change has accelerated the Great Salt Lake’s decline, with rising temperatures increasing evaporation rates and intensifying drought conditions. Additionally, excessive water diversion from the rivers that feed the lake, primarily for agriculture and urban growth, has dramatically reduced its water levels. The shrinking lake threatens ecosystems, as exposed lakebeds lead to habitat loss for brine shrimp and birds that rely on the wetlands. The decline also weakens the lake-effect snowfall that fuels Utah’s famous ski industry and water supply, creating a ripple effect on both the environment and the economy.

Politically, the lake’s future has sparked urgent debates. Conservationists and scientists call for stronger policies to reduce water consumption, while lawmakers balance economic growth with environmental sustainability. In recent years, state leaders have begun taking action, including funding water conservation projects and setting goals to restore the lake’s levels. However, political resistance from agriculture, industry, and real estate developers complicates efforts to implement strict regulations. Additionally, health concerns have grown, as the exposed lakebed releases toxic dust containing arsenic and other pollutants, which can worsen respiratory problems for nearby residents. Addressing the Great Salt Lake crisis will require long-term political commitment, public awareness, and significant changes in water management strategies.

Bonneville Shoreline Trail – Wasatch Mountains, Utah

Bonneville Shoreline Trail - Wasatch Mountains, Utah

The Bonneville Shoreline Trail is a mixed use trail for cyclists and hikers that when completed will stretch more than 150 miles between the Idaho border, and Nephi, Utah. The trail roughly follows the shoreline of the ancient Lake Bonneville, in the foothills of the Wasatch Mountains. The trail is expected to pass within 20 miles of 80% of Utah’s population.

Lake Bonneville, the result of cooler temperatures and higher precipitation during the Late Pleistocene, was the largest of four deep water lakes to exist in the Great Basin over the last 800,000 years. At its greatest extent 18,000 years ago, the lake was more than 980 feet deep, and covered over 20,000 square miles, nearly the size of Lake Michigan. While the lake receded from its maximum extent over thousands of years, one particular event, the Bonneville Flood has been documented in the geologic record, when an alluvial dam on Marsh creek, part of the drainage of the Snake River, was finally breached by rising lake levels. This released over the course of a year, more than 1,200 cu mi of water into the Snake River, and lowered the lake more than 430 feet.

The lake was named after Benjamin Louis Eulalie de Bonneville, an officer in the US military, fur trapper, and explorer of the American West. The largest extant remnants of the lake today are the Great Salt Lake, Utah Lake and Sevier Lake.

Bonneville Salt Flats at Dusk – Utah

Bonneville Salt Flats at Dusk - Utah

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The Bonneville Salt Flats are part of the lake bed of Lake Bonneville. Lake Bonneville, the result of cooler temperatures and higher precipitation during the Late Pleistocene, was the largest of four deep water lakes to exist in the Great Basin over the last 800,000 years. At its greatest extent 18,000 years ago, the lake was more than 980 feet deep, and covered over 20,000 square miles, nearly the size of Lake Michigan. While the lake receded from its maximum extent over thousands of years, one particular event, the Bonneville Flood has been documented in the geologic record, when an alluvial dam on Marsh creek, part of the drainage of the Snake River, was finally breached by rising lake levels. This released over the course of a year, more than 1,200 cu mi of water into the Snake River, and lowered the lake more than 430 feet.

The lake was named after Benjamin Louis Eulalie de Bonneville, an officer in the US military, fur trapper, and explorer of the American West. The largest extant remnants of the lake today are the Great Salt Lake, Utah Lake and Sevier Lake.