The Subway Trail in Zion: Permits, Routes, and Gear

What The Subway actually is

The Subway is a tunnel-shaped section of canyon in the Left Fork of North Creek, on the west side of Zion National Park. Water has bored a curved passage through the rock, and the walls are polished and streaked in the way that only a few million years of moving water produces. It is one of the most photographed spots in a park full of photographed spots, and unlike most of those, you cannot get there by shuttle and a short walk.

It is not in Zion Canyon at all. It is a separate drainage, reached from a trailhead off the Kolob Terrace Road, and everything about the day — the approach, the route, the gear — follows from that fact.

Permits: the first thing to sort out

Yes, you need a permit, for both directions of travel. The Subway is a limited-entry route year-round, and permits are distributed by lottery through the park's system. Demand is highest in spring and autumn, when the light in the tunnel is best and the temperatures are sane. If you want a shot at those months, you need to be applying well before your trip, not the week before.

This is the same lesson the Narrows permit system teaches: the hike is not the hard part. Getting the slot is. Plan for the possibility that you do not get one, and have a backup day or a backup hike in mind.

Two ways to do it: bottom-up and top-down

These are not two versions of the same hike. They are different hikes that happen to end at the same place.

Bottom-up starts at the Left Fork trailhead, drops into the canyon, and walks upstream to the Subway and back. There is no rope work and no rappelling. You will wade the creek repeatedly, scramble over boulders, and do the climb back out of the canyon at the end of the day when you are tired. It is the more popular option precisely because it does not require technical gear, and it is the right choice for almost everyone reading this.

Top-down starts higher on the Kolob Terrace, descends the drainage, and passes through the Subway partway through. It involves rappels — you need a harness, rope, and the competence to use them, plus route-finding through sections that are not signed and not obvious. If you are asking whether you need that gear, you should be doing the bottom-up route. That is not a knock on your fitness; it is a statement about what the top-down route demands.

Gear: what the day requires

The bottom-up route is a creek hike wearing a hiking costume. Treat it like one.

• Shoes you can get wet, with grip. You will be crossing and walking in water all day. Trail runners with aggressive tread beat hiking boots here, and beat anything smooth-soled by a mile.
• A trekking pole or stick. The crossings are slick, and a third point of contact is worth more than any amount of balance.
• Neoprene socks, in cold months. The water in this drainage does not warm up the way you hope.
• Dry clothes and food in a dry bag. Not a plastic bag from the motel. A dry bag.
• More water than you think. The climb out is exposed and there is a long stretch of it.
• Sun protection. The rim approach has no shade.

If you have hiked the Narrows, you already own most of this. The gear principles are the same: wet feet all day, cold water, and footing that punishes hurry.

Safety: the three things that actually hurt people

Flash floods. The Left Fork is a drainage, and anything that rains anywhere upstream comes down it. Check the forecast for the whole area, not just the trailhead, and check it the morning of. If there is meaningful rain in the forecast, the permit can wait — this is the same calculus that governs flash flood safety in the Narrows, and the consequences are the same or worse here because fewer people are around to help you.

The climb out. The exit from the bottom-up route is a sustained, exposed ascent back to the rim, and it comes at the end of the day. People run out of water and daylight on it every season. Start early enough that you are not doing it in the dark.

Navigation. There is no maintained trail in the canyon. You follow the creek and the path of least resistance, and there are places where the obvious-looking route dead-ends. A map, a GPS track, and the willingness to backtrack are all part of the kit.

The day, step by step

1. Start early. The trailhead parking is small and the approach is better in cool air.
2. Walk the rim. From the trailhead you follow a path along the edge of the canyon before dropping in. This is the easy part. Do not let it eat your water.
3. Descend into the Left Fork. The drop in is steep and loose. Poles help. Going down it is a preview of coming back up it.
4. Walk upstream. From here to the Subway you are in and beside the creek, crossing it, scrambling boulders, and picking your way along. There is no single correct line.
5. Reach the Subway. The tunnel section announces itself. Take your photos, eat, and note the time.
6. Return the way you came, then climb out. Budget more time for the exit than the entry took. You are tired now, and it is uphill.

What you will see

The canyon between the drop-in and the Subway is the part nobody warns you about, and it is genuinely good: carved sandstone, cascades, pools with water the color of something artificial. The Subway itself is a short, curved chamber where the light does strange things, especially when sun angles into it. Photographers time whole trips around that light, which is part of why autumn permits go fast.

You will also see people. Not crowds — the permit system prevents that — but you will not have the place to yourself, and the tunnel itself is small enough that a few tripods fill it. Be patient with them; you are one of them.

Making the day work

• Check the weather the night before and the morning of. Not just at the trailhead — upstream of you.
• Turn around at a fixed time, not a fixed feeling. Decide before you start when you will head back regardless of how close you are.
• Do not attempt the top-down route to skip the climb out. It does not skip it; it trades it for rappels.
• Have a plan B. If the permit or the weather falls through, the rest of the park is right there, and Kolob Canyons — a separate section of the park off Interstate 15 — is the quietest corner of it.

The Subway rewards preparation more than fitness. Get the permit early, read the water and the sky, pack for wet feet, and it will be one of the best days you spend in a park that has no shortage of them.