San Rafael Swell is Utah’s open secret: 2,000 square miles of canyons with no ticket booth

Utah’s wildest canyon country has no entrance fee

Central Utah has a stretch of public land the size of a small state, carved into slot canyons, fossil beds, ancient rock art, and canyon overlooks.

Most people drive right past it on Interstate 70 without stopping. The San Rafael Swell covers roughly 2,000 square miles, and almost none of it costs a thing to enter.

The canyon it hides at its center drops 1,200 feet to a river that’s been cutting through rock for millions of years.

Forty million years of geology carved this place

The Swell started as a dome.

Between 40 and 60 million years ago, underground forces pushed a massive section of layered rock upward during the same event that built the Rocky Mountains.

Then water and wind went to work. What’s left is a landscape of deep canyons, buttes, mesas, and narrow slot canyons.

Over millions of years, flash floods and rain cut into the dome, exposing rock layers laid down between 100 and 300 million years ago.

The steep eastern edge, called the San Rafael Reef, rose from that pressure as a wall of tilted sandstone fins you can see from miles away.

Look straight down 1,200 feet at the Wedge Overlook

The Wedge Overlook sits on the canyon rim in the northern Swell, and the drop in front of you is not subtle.

The San Rafael River winds 1,200 feet below through a canyon locals call the Little Grand Canyon, and the layered sandstone cliffs stretch in every direction.

Get there early in the morning or stay for the last light. Both are worth it.

Designated campsites sit before you reach the rim, so you can base yourself here and spend a full day working through the northern section of the Swell.

Little Wild Horse Canyon fits any skill level

You don’t need ropes, climbing gear, or any technical experience to walk one of Utah’s best slot canyons.

Little Wild Horse Canyon sits in the southern Swell, close to Goblin Valley State Park, and the trailhead is reachable by regular passenger car on a paved road.

The walls close in around you as the canyon twists through sculpted Navajo sandstone, curving and narrowing overhead.

Walk in a couple of miles and head back, or connect with neighboring Bell Canyon for a full 8-mile loop. Either way, the scale of the stone around you does the work.

The San Rafael Reef holds at least 40 slot canyons

The Reef is where the Swell gets technical.

Layers of Navajo and Wingate sandstone tilted nearly vertical by the dome’s formation now stand as a wall of fins and cliffs along the eastern edge.

Rainwater worked its way into the cracks over millions of years and carved a maze of slot canyons draining into the Swell.

At least 40 have been explored, ranging from walks you can do in sneakers to routes that require rappelling gear.

Utah has one of the highest concentrations of slot canyons on Earth, and the Reef puts dozens of them in one place.

Crack Canyon and Ding and Dang reward experienced hikers

Past Little Wild Horse, the crowds thin out fast. Crack Canyon cuts through the Reef in a winding, tight passage full of interesting rock formations.

Ding and Dang Canyons sit close by and run more rugged, suited for experienced hikers who want fewer people and more of a challenge.

These are the Swell’s wilder corners, and they earn that reputation. One thing stays the same across all of them: check the weather before you go.

Flash floods move through slot canyons without warning, and there’s no high ground once you’re inside.

Buckhorn Wash has 2,000-year-old painted figures on the cliff

A sandstone cliff in Buckhorn Wash holds one of the finest examples of Barrier Canyon style rock art in the Southwest.

The panel runs more than 130 feet along the rock face and includes both painted pictographs and pecked petroglyphs, some placed there over 2,000 years ago.

The site has a short hiking trail, interpretive panels, a shade structure, and picnic tables, and it sits on the National Register of Historic Places.

Vandalism damaged portions of it over the years. A restoration project in 1996 repaired what could be repaired. Some of it could not.

The Rochester Panel layers 2,000 years of human history

The Rochester Art Panel sits above Muddy Creek on the western side of the Swell, reached by an easy half-mile hike.

What you find on the rock is a dense collection of Fremont culture petroglyphs, human figures, animals, and a distinctive rainbow-shaped design at the center of the panel.

Images from Archaic and Ute peoples are mixed in, making it a layered record of everyone who passed through this canyon over thousands of years.

Horses appear in some of the carvings, which puts those images well after contact with Spanish or European settlers. Don’t touch anything.

The carvings are fragile and there’s no fixing them once they’re gone.

Walk among the goblins at Goblin Valley State Park

On the southeastern edge of the Swell, Goblin Valley State Park holds thousands of mushroom-shaped sandstone formations that formed as softer sections of Entrada Sandstone eroded faster than harder layers around them.

The result is a valley full of strange, bulging shapes at eye level that you can walk through freely. No staying on the trail here.

Families with kids tend to spend a long time in the main valley. The park also has marked hiking trails, camping with yurts, disc golf, and dark skies at night.

For something more demanding, Goblin’s Lair is a cave-like slot canyon at the end of a marked trail, though rappelling into it requires technical gear and a backcountry permit.

More than 12,000 dinosaur bones came out of this quarry

The Cleveland-Lloyd Dinosaur Quarry, now part of Jurassic National Monument, sits in the northern Swell and holds one of the densest concentrations of Jurassic-age fossils ever found.

Over 12,000 individual bones from at least 74 dinosaurs have come out of this site, and more than 75 percent of them belong to Allosaurus.

Scientists still can’t fully explain why so many predators ended up in one place.

The visitor center has a full Allosaurus skeleton, bone bed maps, and exhibits covering the quarry’s excavation history.

The dig site itself is currently closed for construction, but the trail system, visitor center, and picnic areas are open.

Bike the rim, float the river, or just drive the back roads

The Good Water Rim Trail runs 15 miles of singletrack along the edge of Good Water Canyon, with views dropping into the Little Grand Canyon the whole way.

There are no major climbs, which makes it a solid intermediate ride.

When spring water levels are high enough, you can kayak the San Rafael River through the Little Grand Canyon, a class I-II stretch of about 14 miles.

If you’d rather stay in a vehicle, off-highway trails crisscross the Swell from easy scenic drives to routes like the Devil’s Racetrack.

Desert bighorn sheep, pronghorn, wild horses, mule deer, and peregrine falcons all move through this country.

Come prepared, because services are far and few between

The Swell gives you the kind of scenery you’d pay an entrance fee for at any of Utah’s famous parks, but almost none of it costs anything.

The combination of slot canyons, ancient rock art, a working dinosaur quarry, and canyon views that run for miles in every direction is hard to find in one place. But it’s remote.

Cell service drops out across most of the area.

Bring more water than you think you need, a full tank of gas, and enough food and supplies to stay out longer than planned. The roads can close fast after rain.

The people who come prepared are the ones who come back.

Plan your visit to the San Rafael Swell in Utah

To get to the Swell, take Interstate 70 to the Green River area, about 16 miles east of the Swell’s main access points. The nearest towns for gas, food, and lodging are Green River, Price, Castle Dale, and Hanksville.

Spring and fall have the most comfortable temperatures for hiking. Summer days can push past 100 degrees, and winter nights can drop well below zero.

Most gravel roads are passable in a regular vehicle during dry weather, but check road conditions before heading out.

The BLM Price Field Office in Price can give you current maps and conditions. There’s no fee to enter most of the Swell. Goblin Valley State Park charges a separate day-use fee.

This article was created with AI assistance and human editing.

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