Left Fork of North Creek

Overview

This is the famous “Subway” section of the Left Fork of North Creek—an otherworldly tubular slot with fern-draped walls, green pools, and constant cascades. It’s rugged, wet, and unforgettable. You can reach it via a strenuous bottom-up hike or tackle a technical top-down canyoneering traverse. Either way, permits are mandatory year-round.

Routes at a Glance

• Bottom-up hike: Non-technical but demanding. Expect ankle-to-knee-deep wading, boulder-hopping, slick sandstone, and navigation challenges. Plan on roughly 8–9 miles round trip and 5–10 hours depending on conditions and your party. You’ll pass waterfalls (including the photogenic series below the Subway) and turn around at the start of the technical drops.
• Top-down canyoneering: A very strenuous 9.5-mile through-route from Wildcat Canyon Trailhead to Left Fork Trailhead. Requires ropes, anchors, solid rappelling and route-finding skills, and several cold swims. Even in hot weather, insulation is often needed.

Permits and How to Get One

Permits are required for both routes, with limited quotas. Apply through a Seasonal Lottery well in advance; if you miss out, try the Daily Lottery two days before your target date. The trip is day-use only (no camping), group size is capped at 12, and formally guided trips aren’t authorized in wilderness. The reservation holder must pick up the permit in person at the Zion Canyon Visitor Center Wilderness Desk; bring vehicle info and allow time at the desk. Fees include a nonrefundable application fee and a per-person charge when you pick up the permit.

Trailhead and Getting Oriented

Bottom-up trips start from the signed Left Fork Trailhead on Kolob Terrace Road. Expect a steep ~400-foot descent to the creek at the start—and an equally stiff climb back out at the end. Mark a GPS waypoint for the exit; people miss it every season. Dark basalt on the rim is a helpful landmark above the orange sandstone. Plan for limited to no services at the trailhead: arrive early for parking, bring all the water you need, and pack out your trash.

Safety You Should Take Seriously

• Flash floods: Do not enter if rain or thunderstorms threaten anywhere in the watershed.
• Footing: Polished sandstone and algae are slick—wear footwear with excellent traction; trekking poles help in the creek.
• Cold water: It’s chilly year-round. Neoprene socks are a comfort boost on the bottom-up; the top-down route involves cold swims and typically requires thermal protection.
• Navigation: This is largely off-trail. Carry a written route description, pre-download maps, and mark key waypoints.

Photography and When to Go

For photos, softer light works best: mid-morning or mid-afternoon in summer and mid-day in autumn to keep the pools bright but shaded. Fall color in the canyon usually peaks in late October to early November. Start early (especially on weekends) for parking, cooler temps, and fewer people.

Geology in Brief

You’ll descend from a cap of black basalt into the Kayenta Formation with massive Navajo Sandstone looming above. The Subway’s smooth, fluted walls and potholes are sculpted by persistent flow and sediment over millennia.

Is It Worth It?

If you’re up for an all-day, wet, hands-on adventure, the Subway is one of the park’s singular experiences. Permits can be competitive and the route is no joke—but for prepared hikers and canyoneers, it’s absolutely worth the effort.