A slot canyon is a corridor carved into sandstone by water, sometimes wide enough for two people, sometimes narrow enough that you turn sideways and take your pack off. The walls run tens of metres above you and the light bounces down them in bands of orange.
They are also the single most dangerous landform on a casual hiker’s itinerary in the Southwest, for one reason covered at the end of this piece. Here is where to go and how to do it properly.
Arizona
Upper and Lower Antelope Canyon, Page
The canyon everyone has seen in a photograph. It sits on Navajo Nation land near Page, and access is by guided tour only. No independent hiking, no exceptions.
The two halves are different trips:
- Upper Antelope is flat, wide at the floor and famous for the shafts of light that drop through around midday in the summer months. It is also the more crowded.
- Lower Antelope is narrower, involves ladders and stairs, and takes longer. Most people find it the better walk.
Book ahead, budget for the tour plus the Navajo permit fee, and expect the schedule to be tight.
Canyon X and Waterholes Canyon
Also near Page, also guided, and far quieter than Antelope. If your goal is the canyon rather than the photograph everybody else has, start here.
Wire Pass to Buckskin Gulch
The trailhead is in Arizona, the canyon runs into Utah, and it is the longest slot canyon in the world. Wire Pass gives you the short version: a couple of miles to the confluence, through a proper narrow section, and back.
Day use needs a permit. Buckskin Gulch as a through-trip is a serious multi-day undertaking with a deep, cold pool section and a mandatory overnight permit.
Utah
Peek-a-boo and Spooky Gulch, Grand Staircase-Escalante
The classic pairing, reached down Hole-in-the-Rock Road. A loop of roughly 3.5 miles links the two.
Peek-a-boo starts with a climbing move at the entrance that stops some people at the door. Spooky earns its name: it narrows to the point where a daypack has to come off and be carried in front of you. Larger hikers turn back there, and there is no shame in it.
The access road is dirt, long, and turns to slick clay after rain.
Little Wild Horse and Bell Canyon, San Rafael Swell
The best introduction to slot canyons anywhere. Little Wild Horse needs no ropes, no technical skill and no permit, and the narrows go on far longer than you expect. Linked with Bell Canyon it makes a loop of about eight miles.
This is the one to take someone who has never been in a slot.
Kanarra Falls, Kanarraville
A short creek walk into a red slot with a waterfall and a ladder. Numbers are capped daily and permits sell out, so book before you drive. You will be walking in water the whole way.
Zion: Orderville Gulch and the Subway
The Narrows in Zion is a river corridor rather than a true slot, but Orderville Gulch, which joins it, is the real thing. The Subway is a permitted, technical route with rappels and cold water, not a hike.
Everything in Zion runs on a lottery permit system. Plan months out.
The flash flood rule
This is the part that matters. A slot canyon is a drain. Rain that falls tens of kilometres away, on ground you cannot see, over a sky that is blue above you, arrives as a wall of water in a corridor you cannot climb out of.
Non-negotiable habits:
- Check the flash flood forecast for the whole watershed, not for the trailhead. The National Weather Service issues these by region for exactly this reason.
- Do not enter a slot when a watch or a warning is posted. A watch means it is possible. That is enough to cancel.
- Monsoon season, roughly July to September, raises the risk sharply. Storms build in the afternoon.
- Learn the signs. A change in water colour, a rising roar, floating debris, a sudden wind through the canyon. If you notice any of them, climb, immediately, as high as you can get.
- Look for the escape points on the way in. Note the ledges and the wide spots as you pass them.
People die in these canyons in groups, on clear days, most years. Treat the forecast as the decision-maker, not as a suggestion.
What to bring
- Shoes with grip that you accept will get wet. Many slots hold standing water and mud year round.
- A small pack. A large one does not fit through the narrow sections, and carrying it in front of you gets old fast.
- A headlamp. Deep slots go dark in the middle even at noon.
- More water than the distance suggests. Progress is slow and the desert above is hot.
- A dry bag for the phone. Sand and water both get everywhere.
Leave the tripod at home unless the tour permits it. Most guided canyons banned them years ago.
Timing the light
The light beams that make these canyons famous need three things at once: a high sun, an opening in the roof, and dust or sand in the air. That combination happens around the middle of the day in late spring and summer, and it lasts for minutes rather than hours.
Outside those windows the canyons still glow. The reflected light off the walls is the point, and it works all day.
If you like tight, dark and technical
Slot canyons scratch the same itch as caving and as coastal scrambling. There is a guide to overnighting underground at https://www.thrillingspots.com/sleeping-in-a-cave-an-adventurers-guide/, and if the appeal of walking sideways through a cold wet corridor needs explaining to your friends, this article does the job. For the wet-rock version at sea level, thrillingspots.com/the-complete-guide-to-tide-pooling is the closest cousin.