Utah’s Great Salt Lake has a wild island with 600 bison, but most locals never visit

It’s closer to Salt Lake City than you’d think

Forty miles north of Salt Lake City, a seven-mile causeway leads you out across the water to an island most Utahns have never set foot on.

Antelope Island covers 28,000 acres of grassland, mountains, and salt-lake shoreline, and it runs wild in a way that feels nothing like the city you just left. Bison graze along the road.

Ancient rocks push up through the hillsides. The Milky Way comes out at night.

The island has been here for a long time, and it has the geology to prove it.

Fremont and Kit Carson named this place in 1845

John C. Fremont and Kit Carson were the first known non-Native explorers to reach the island, and they named it after the pronghorn they found grazing here. That was 1845.

Three years later, the LDS Church set up a ranch on the island to manage cattle and sheep. By 1870, a man named John Dooly Sr. had bought the whole island and started the Island Improvement Company.

The State of Utah eventually purchased the northern portion in 1969, then the rest in 1981, turning it into the state park it is today.

Twelve bison started a herd that never stopped growing

In 1893, when fewer than 1,000 bison remained in all of North America, Dooly and a partner named William Glasmann brought 12 of them to the island.

Those 12 animals are the reason you can stand on the road today and watch 550 to 700 bison moving through the grass like they own the place, which, in a way, they do.

The Antelope Island herd ranks among the oldest and largest publicly owned herds in the country, and its genetic heritage makes it valuable to conservation programs across the nation.

Pronghorn, bighorn sheep and 250 bird species share the island

Bison get most of the attention, but the island holds a lot more.

Pronghorn antelope came back in 1993 after a reintroduction effort, and you’ll spot them across open stretches of grassland. Bighorn sheep, mule deer, coyotes, bobcats, and badgers all live here too.

The Great Salt Lake shoreline pulls in about 250 bird species each year, including avocets, pelicans, stilts, and herons. If you want to see burrowing owls, check the grasslands.

The Fielding Garr Ranch area and the causeway are two of the best spots to watch birds.

These rocks are older than the Grand Canyon by over a billion years

About two-thirds of the island is made of gneiss, a banded metamorphic rock from the Farmington Canyon Complex dated to roughly 1.7 billion years old.

You’ll see it striped through the hillsides along the trails.

Near the visitor center and Buffalo Point, look for Tintic Quartzite, which comes in at about 550 million years old.

The youngest rocks on the island are tufa deposits left by ancient Lake Bonneville, and those are only 10,000 to 15,000 years old.

The whole island sits in the Basin and Range province between the Wasatch and Sierra Nevada mountain ranges.

Frary Peak puts the whole lake beneath your feet

The highest point on the island sits at 6,596 feet, and the trail to get there runs about 6.6 miles round trip with 2,100 feet of elevation gain.

From the top, you can see the Great Salt Lake spread out below you, the other islands rising from the water, and the Wasatch Mountains running along the horizon.

The trail cuts through some of the island’s ancient rock formations on the way up, and bison and pronghorn are commonly spotted along the lower sections before the trail climbs into rougher terrain.

Short trails deliver big payoffs without the climb

Not every trail on the island demands a half-day commitment.

Buffalo Point Trail covers about a mile round trip with a gentle climb and a wide view of the lake at the top. The Lakeside Trail runs six miles round trip along the shore with almost no elevation change.

Head to Ladyfinger Point on the northwest side and you can look out to Egg Island, a protected bird sanctuary sitting just offshore.

All told, the island has 36 miles of trails open to hikers, mountain bikers, and riders on horseback.

Utah’s oldest building still stands on the island’s southeast shore

The Fielding Garr Ranch sits near one of the island’s strongest freshwater springs, and the adobe ranch house there was built in 1848, making it the oldest Anglo-built structure in Utah still standing on its original foundation.

The ranch ran continuously from 1848 to 1981. At its peak in the 1920s, more than 10,000 sheep passed through its corrals each year.

Today you can walk through the ranch house, blacksmith shop, shearing barn, and springhouse. The whole property sits on the National Register of Historic Places.

The lake water here is four times saltier than the ocean

Bridger Bay on the northwest end of the island has oolitic sand beaches where you can wade into the Great Salt Lake. The water runs four to five times saltier than the ocean, so floating takes almost no effort.

The sand underfoot is made of calcium carbonate and feels smooth, almost soft. Brine shrimp and brine flies live along the shoreline as a natural part of the ecosystem.

Showers are available at the beach area, which matters more than you’d think once you’ve felt that salt dry on your skin.

The Milky Way comes out here just 40 miles from downtown

Antelope Island earned International Dark Sky Park status in 2017, and the reason is geography.

The island sits in the middle of a lake with open water on all sides, which cuts off the light pollution that normally bleeds across the sky near a city. The western half faces almost no artificial light at all.

On a clear night, you can see the Milky Way without any equipment.

Buffalo Point, White Rock Bay, and Ladyfinger Point are the most popular spots for stargazing, and local astronomy groups run periodic star parties with telescopes set up for visitors.

Each fall, riders drive 600 bison across the island on horseback

Once a year, hundreds of horseback riders line up at the south end of the island and push the entire bison herd north to corrals near the causeway.

The Antelope Island bison roundup is one of only a few public events of its kind in the country. You can watch the final push into the corrals from a designated viewing area.

After the drive, every bison gets health screenings, vaccinations, and an RFID tag. The ones that would push the herd above a sustainable size of about 550 animals go to public auction.

Camping here means waking up to the lake with no neighbors in sight

Bridger Bay has picnic areas, beach access, and more than 80 campsites, ranging from primitive backcountry spots to partial-hookup RV sites. The park stays open year-round.

After the day-use gate closes, the island gets quiet in a way that’s hard to find this close to a major city. No one lives here permanently.

The lake stretches out in every direction.

If you came for the bison and the geology and the dark skies, staying the night is when all three of those things land at once.

Visit Antelope Island State Park in Utah

To get there, take Exit 332 off Interstate 15 and head west on Antelope Drive until you reach the causeway. The seven-mile drive across the water takes you straight to the park entrance.

The visitor center sits on the northern end of the island, and the Fielding Garr Ranch is about 11 miles south on the island’s paved road.

The park is open daily year-round, though gate hours shift by season and the park closes on Thanksgiving and Christmas. Check the official website for current hours and camping reservations before you go.

This article was created with AI assistance and human editing.

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