Great Salt Lake
N Solar Rd, Grantsville, UT
Grantsville, UT
A landlocked sea saltier than the ocean, alive with brine shrimp and millions of birds, and slowly shrinking before our eyes.
The Great Salt Lake is the largest saltwater lake in the Western Hemisphere, a vast, shallow, shining sheet of water in the desert basins of northern Utah, saltier than any ocean. It has no outlet, so the rivers that flow in can only leave by evaporating, and over thousands of years that has concentrated the minerals until a swimmer floats on the surface like a cork. From the shore it stretches to the horizon, its islands seeming to hover above the water in the heat.
For all its strangeness, the lake is bursting with life, not fish, which cannot survive the salt, but tiny brine shrimp and brine flies in unimaginable numbers, which in turn feed millions of migrating birds. It is one of the most important bird places on the continent, and one of its most watched, because in recent decades the lake has shrunk alarmingly, a slow crisis visible right at the water's edge.
What Guests Love
- The sheer scale of a saltwater sea in the middle of the desert
- Floating effortlessly in water too salty to sink in
- Millions of migrating birds gathering to feed on the brine
- Sunsets that turn the whole horizon of water and mountains to gold
Worth Knowing
- Much of the shore is mudflat and marsh; reach the water through state parks and marked access points
- The lake is shrinking, so the shoreline can lie far out beyond the historic edge
- Brine flies swarm the shore in warm months and the water can smell strong on still days
- It is a big, exposed landscape with few services, so bring water and sun protection
Details
Grantsville, UT
Learn about Great Salt Lake
The last of an Ice Age sea
The Great Salt Lake is what remains of Lake Bonneville, an enormous freshwater lake that filled much of western Utah during the last Ice Age, in places over a thousand feet deep. When the climate warmed, most of that water evaporated, leaving this salty remnant in the lowest part of the basin. You can still trace the old shorelines of Bonneville as level benches cut into the surrounding mountains, high above the present lake.
Because the lake has no river carrying water out to the sea, everything that flows in stays, and the water leaves only as vapor, leaving its dissolved minerals behind. That is why the lake grows steadily saltier and why its level swings so widely with the wet and dry years, spreading across huge flats when it is high and pulling far back when it is low.
Brine shrimp, birds, and a living lake
Almost no fish can live in water this salty, but the lake is far from empty. Its shallows teem with brine shrimp, small enough to hold in a spoonful of water yet present in staggering numbers, along with clouds of brine flies along the shore. Those small lives are the engine of the whole ecosystem, and brine shrimp eggs are even harvested here as a global commodity to feed fish and shrimp farms.
Feeding on that abundance are the birds, and they are the lake's true glory. Millions of them, avocets, stilts, phalaropes, pelicans, gulls, and vast rafts of eared grebes, gather on the lake during migration, some traveling from the far ends of the hemisphere. For many species it is a critical staging ground, and the sight of them wheeling over the water in their thousands is one of the great spectacles of the West.
Islands and the people of the lake
Islands rise from the shallow water across the lake, the largest of them Antelope Island, roamed by a free-ranging herd of bison and reachable by causeway, along with others that shelter nesting pelicans and other birds. As the lake drops, some islands become peninsulas, joined to the shore by exposed lakebed, another sign of the changing water.
The lake lies within the ancestral homeland of the Shoshone, Ute, Goshute, and Paiute peoples, who lived around its marshes and gathered its resources for thousands of years and whose descendants remain in Utah today. After Mormon settlers reached the valley in 1847, the lake became a landmark and a playground, ringed for a time by grand bathing resorts where visitors floated in the buoyant salt water.
A shrinking lake and the seasons
In recent decades the Great Salt Lake has fallen to record low levels as more of the water that once fed it is diverted upstream, and drought has deepened the loss. The retreating water exposes broad flats of dry lakebed that can blow as dust, threatens the birds and brine shrimp that depend on the shallows, and has become one of Utah's most urgent environmental concerns. Standing at the shore, you can often see just how far the water has pulled back.
Spring and fall are the best times to visit, mild and alive with migrating birds, while summer brings heat, brine flies, and sometimes a strong lake smell on still days. Winter is quiet and stark, the flats sometimes frosted white. In any season the lake rewards those who come to its shores at sunset, when the light pours across the water and the whole vast, strange sea seems to catch fire.
Closest Boutels
The closest Boutel™ stays, so you can turn this stop into an overnight. Each is an independently owned, editorially selected place to stay.
Things to Do Near Grantsville
Antelope Island State Park
About 30 miles northeast
The lake's largest island, home to a free-ranging bison herd, with beaches, trails, and sweeping views.
Great Salt Lake State Park
About 25 miles east
The south-shore marina and beach, base of the lake's sailing fleet and famous for its sunsets.
Grantsville
About 15 miles south
A small farming town in Tooele Valley, a quiet base south of the lake.
Bonneville Salt Flats
About 90 miles west
The blindingly white salt plain left by the old lake, famous for land-speed racing.