Originally published on When In Your State.

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It’s older than almost anything on Earth

Big Cottonwood Canyon cuts 15 miles through Utah’s Wasatch Range, and you can get there from Salt Lake International Airport in about 25 minutes.

The canyon runs inside the Uinta-Wasatch-Cache National Forest, and depending on the season, you can hike to alpine lakes, ski a thousand acres of mountain terrain, watch aspens turn gold, or cast a line into a creek fed by snowmelt.

The road in is scenic. What waits at the end of it is the real story.

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The canyon walls are nearly a billion years old

The rock lining the canyon belongs to the Big Cottonwood Formation, and geologists date it between 850 million and one billion years old.

Locked inside those quartzite walls are some of the oldest tidal rhythmites ever recorded, thin layers of sand and silt that ancient tides pressed into the seafloor.

Glaciers moved through here between 30,000 and 10,000 years ago, filling the canyon with hundreds of feet of ice and carving the landscape you walk through now.

The scattered boulders along the canyon floor didn’t roll there.

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Donut Falls pours through a hole in the rock

The name tells you what to expect, and the falls still catch you off guard.

Water drops through a circular opening in the rock and falls into the pool below, shaped like a donut from the right angle.

The trail is about 1.5 miles round trip with a few hundred feet of elevation gain, winding through aspen and pine along a mountain creek. Almost anyone can handle it.

Stay off the rocks near the base, though. The surface is wet, slick, and steep, and people have died there.

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Lake Blanche sits below a 10,320-foot peak

The Lake Blanche trail runs three miles one way and climbs about 2,700 feet, so you’ll earn this one. You’ll switchback through aspen forest before the trees thin and the alpine basin opens up.

Sundial Peak rises to 10,320 feet above the lake, its pointed ridge reflected in the water when the wind dies. Two more lakes, Florence and Lillian, sit just beyond Lake Blanche and take about 10 minutes to reach.

Keep your eyes on the willows and wetland edges along the way. Moose work this trail.

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Silver Lake has a boardwalk and brook trout

Silver Lake sits near the top of the canyon at Brighton, ringed by forest and mountain ridgeline. A boardwalk circles part of the lake, lined with benches and interpretive signs, and a dock juts out for fishing.

The lake is stocked with brook and rainbow trout, and moose show up often enough near the water that the visitor center staff will tell you where to look.

Naturalist guides staff the Silver Lake Visitor Center from May through September. In winter, the trail system around the lake becomes part of Solitude’s groomed cross-country network.

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Brighton opened in 1937 with a wire rope and an old motor

Members of the Alpine Ski Club built Brighton’s first rope tow from cable wire and a salvaged elevator motor in the winter of 1936-1937, making it Utah’s first ski resort, two years before Alta opened.

The resort takes its name from William Stuart Brighton, a Scottish immigrant who built a hotel in the canyon in the 1870s to feed and house miners passing through.

Today Brighton runs more than 1,000 skiable acres with terrain spread across every ability level. It was also one of the first Utah resorts to welcome snowboarders, which tells you something about the crowd it draws.

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Solitude gets 500 inches of snow and earns its name

Solitude Mountain Resort sits in the upper canyon with about 1,200 skiable acres and a noticeably quieter feel than Utah’s bigger, more crowded resorts.

Between Brighton and Solitude, the Solitude Nordic Center maintains groomed cross-country trails through the canyon forest.

The area averages around 500 inches of snowfall a year, which is why the skiing here draws the same loyal crowd season after season.

When the snow melts, Solitude switches to lift-served mountain biking, hiking, and disc golf. The terrain doesn’t change much.

The gear does.

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Climbers work the overhangs at the S-Curve

About 4.25 miles from the canyon mouth, the S-Curve area draws rock climbers to bolted routes across a range of difficulty levels, with overhangs on many of the lines.

Storm Mountain farther up offers more climbing on the same quartzite and granite walls. The rock here is solid and the routes stay climbable from March through November.

If you’ve never climbed canyon walls before, the S-Curve has enough variety that you can ease in without committing to anything too serious. More experienced climbers tend to gravitate toward the overhangs.

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The canyon has seven fishable lakes plus a creek

Big Cottonwood Creek runs the full length of the canyon with deep holes that hold fish, but you’ll need waders if you plan to get in the water. The watershed rules prohibit wading without them.

Silver Lake at Brighton is stocked with brook and rainbow trout, and the Brighton Lakes, Mary, Martha, and Catherine, give you three more options surrounded by mountain views.

Lakes Blanche, Florence, and Lillian are also stocked with brook trout. Seven lakes and a creek-length of water is a lot of options for a single canyon.

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Guardsman Pass turns gold in late September

At the top of the canyon, Guardsman Pass climbs to 9,717 feet before dropping into Park City and Heber Valley on the other side.

The road is seasonal, typically open from late spring through early fall and often closed by mid-October when snow arrives.

Fall color peaks here between late September and early October, when aspen groves go gold and maples run red against the exposed Wasatch ridgeline.

Near the summit, the Bloods Lake trailhead puts you on an easy high-elevation walk through wildflower meadows if you catch it in summer.

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No dogs, no swimming, and no exceptions

Big Cottonwood Canyon supplies a significant portion of Salt Lake Valley’s drinking water, and the rules around that are serious.

Dogs and other domestic animals are prohibited in the canyon entirely, city ordinance, no exceptions. Swimming and wading in any lake or stream are also prohibited.

A first-time violation runs about $650 and carries a Class B misdemeanor.

The treatment plants downstream are built for clean source water, so the rules exist to keep contamination from becoming a much larger problem.

If you’re traveling with a dog, nearby Mill Creek Canyon allows them.

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The canyon runs 10 degrees cooler than the city below

Summer temperatures in the canyon average about 10 degrees Fahrenheit cooler than Salt Lake Valley, which makes midday hikes feel manageable when the valley floor is pushing 95.

Wildflowers bloom along the trails from mid-July through early August.

Then the aspens turn gold and the oaks go red, and the whole canyon road from the mouth to Guardsman Pass becomes one of Utah’s most-driven fall color routes.

The mix of pine forest, open meadow, exposed ridgeline, and aspen grove means the view changes every half-mile. There’s no single best spot.

The whole drive is the destination.

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Visit Big Cottonwood Canyon in Utah

You can reach the canyon from downtown Salt Lake City in about 25 minutes via I-215 to the 6200 South exit, then east on SR-190.

There’s no fee to drive the canyon road itself, but some trailheads charge $10 per vehicle for a 3-day parking pass. An America the Beautiful Pass covers that fee.

The Silver Lake Visitor Center is open daily from late May through September. Check road conditions before driving Guardsman Pass in fall.

And remember: no dogs, no swimming, no wading anywhere in the canyon.

This article was created with AI assistance and human editing.