The Complete 2026 Guide (Shuttle, Gear, Trail Options)

I've done this hike enough times this summer that I'm honestly a little embarrassed to admit I still occasionally get the shuttle times wrong. But that's sort of the point of this guide — I've made basically every mistake there is to make on this trail so you don't have to. Missed a bus, hiked back up in the worst heat of the day because I didn't check the schedule, once explained to a ranger that I definitely didn't need the shuttle (I did, in fact, need the shuttle). If you're planning a Mammoth Lakes trip this summer and only have time for one hike, this is probably it, and it's also the one that trips up more people than any other trail in the area, mostly because of the shuttle system. Here's everything I've picked up, mistakes included.

Quick Stats

• Distance: 2.5–12.3 miles round trip, depending on which route you pick (options below)
• Difficulty: Easy to Moderate for the standard route, Hard if you're connecting via Mammoth Pass
• Elevation: Starts around 7,600 ft at Devils Postpile, drops to roughly 7,200 ft at Rainbow Falls
• Best time: Mid-June through September, early morning for light and to beat crowds
• Dogs: Allowed on trail and on the shuttle, leashed and muzzled on the bus
• Shuttle required: Yes, for almost everyone, mid-June through late September

Why This Hike Is Worth the Shuttle Hassle

Devils Postpile is a genuinely strange geologic formation — sixty-foot columns of basalt that formed when lava cooled slowly enough to crack into these tall, mostly six-sided posts. I've read the geology plaque at the top more times than I'd like to admit and I still have to remind myself which part is the glacier-polished surface and which part is just, well, rock. You can climb to the top and walk across it, which gets me every time, more than the base view most people photograph. From there, the trail follows the San Joaquin River down to Rainbow Falls, a 101-foot drop that earns its name around midday when the sun hits the mist just right. I've hiked it at 7 a.m. with nobody else around and at 1 p.m. shoulder to shoulder with fifty other people who all had the same idea I did. Both versions are worth doing at least once, though I'd argue only one of them is worth doing on purpose.

The 2026 Shuttle System (This Is the Part I Always Mess Up)

Let's get this out of the way first, because it's the part that catches nearly everyone, myself very much included.

Almost everyone has to ride the shuttle. Private cars aren't allowed into the Reds Meadow / Devils Postpile valley during operating hours unless you meet a specific exception (more on that below). This is not a polite suggestion — rangers do check, and I say that from experience I'd rather not elaborate on.

2026 shuttle schedule:

• Season: Late June through September, weather and road conditions permitting
• Thursdays: 7:30 a.m.–7 p.m., buses run about every two hours
• Friday–Sunday:
  • 7:30–9:00 a.m. — every 45 minutes
  • 9:00–10:00 a.m. — every 30 minutes
  • 10:00 a.m.–4:20 p.m. — every 20 minutes
  • 4:45–6:15 p.m. — every 45 minutes
• Last bus out of Reds Meadow Valley: 7:00 p.m. — do not miss this one, I promise you do not want to find out what happens if you do
• Note: The shuttle does not run Monday through Wednesday this season, so plan your visit for Thursday through Sunday

Getting to the shuttle: If you're staying in the Village at Mammoth, shuttles to Main Lodge depart at 7:15, 8:00, and 8:45 a.m. only. Outside of those times, take the free Mammoth Mountain Bike Park Shuttle from the Village to Main Lodge, then transfer to the Reds Meadow/Devils Postpile shuttle at the Panorama Gondola Building. Only the Village-to-Main-Lodge leg is free — the ride down into the valley has its own fare, which I somehow still forget every single time and end up patting down my pockets for cash like it's the first I'm hearing of it.

Shuttle fares:

• Day pass: $15 adult, $7 child (ages 3–17)
• Three-day pass: $30 adult, $14 child
• Season pass: $75 adult, $35 child
• Kids under 2: free

Buy tickets at the Panorama Gondola Building near Main Lodge. Reservations are strongly encouraged for peak morning hours, especially on weekends — I've stood in that walk-up line longer than I've spent on some entire hikes. Book through Mammoth Mountain's site or by phone if you know your dates. Future you will be grateful. Past me, less so.

Who doesn't have to ride the shuttle:

• Arriving before 7:00 a.m. or after 7:00 p.m.
• Staying overnight at Reds Meadow Resort or the Reds Meadow Campground (backpackers still must use the shuttle system)
• Hauling a cartop boat or float tube for the lakes
• Towing a livestock trailer for trail use
• Displaying a handicap placard or plates
• Hunters transporting weapons or game
• Arriving outside the shuttle's operating season or hours

If you qualify for an exception and drive in, you'll still pay the standard valley entrance fee on your way out unless you're carrying a federal recreation, military, senior, or access pass.

One more 2026-specific note: Reds Meadow Road is still under active reconstruction, and it's affecting valley camping this year specifically. Only Reds Meadow Campground is open for 2026 — Agnew Meadows, Minaret Falls, Pumice Flat, and Upper Soda Springs are all closed for the season, along with the Devils Postpile campground itself. If you were planning to camp in the valley, double check current availability before you go, because this could shift again and I am not the person to ask about mid-season updates on federal road construction.

Hiking With Dogs

Good news — dogs are welcome on the trail and on the shuttle. The catch: to ride the bus, your dog needs to be leashed and muzzled the entire ride, which is a detail I somehow didn't know the first time I brought my dog down and had a mildly stressful ten minutes at the ticket counter figuring it out. If you don't own a muzzle, don't panic like I did — you can buy one right at the shuttle ticket counter at the Panorama Gondola Building before you board. Once you're off the bus and on the trail, the muzzle isn't required, just the leash.

Trail Options: Pick Your Version

1. Short version — Devils Postpile only (about 1 mile round trip) Straight from the Devils Postpile Ranger Station up to the formation and back. Good if you're short on time or hiking with someone who can't do much distance. You still get the full postpile experience, including the climb to the top, without needing to commit to a whole morning.

2. The classic — Postpile + Rainbow Falls (about 4.5–5 miles round trip) This is the one I send almost everyone on, and the one I still do most often myself, mistakes and all. Start at the Ranger Station, visit the Postpile, then continue along the river down to Rainbow Falls, with an option to descend the stairs to the base for the full misty view and a swimming hole on hot days. Easy to moderate, well-shaded for most of it, and doable in half a day, assuming you didn't oversleep and miss your shuttle window like I have more than once.

3. The connector — Mammoth Pass Trail from Horseshoe Lake (about 12.3 miles round trip) If you want to skip the shuttle entirely and don't mind a long day, you can hike in from Horseshoe Lake Trailhead over Mammoth Pass and connect to both Devils Postpile and Rainbow Falls on foot. This is a genuinely different hike — hard, full-day, high alpine terrain — and it's the version I'd only recommend if you're already comfortable with 12+ mile days at altitude. I underestimated it the first time. Don't be me.

What to Wear and Bring

Footwear: The main trail is well-maintained and not technical, so trail runners are honestly fine for most people on the classic route. If you're doing the Mammoth Pass connector, switch to real hiking boots — that route has more exposed rock and stream crossings that get slick, something I learned the wet-sock way.

Clothing: Mornings in the valley run cold even in July, so I always start in a light layer I can peel off, and inevitably tie around my waist and forget I'm carrying for the rest of the day. The exposed sections near Rainbow Falls get hot and sun-blasted by midday. A sun hat and sunglasses do more work here than people expect, myself included, on the several occasions I've hiked out without either.

Water: Bring more than you think. There's no reliable water source along most of the trail, and the climb back up from Rainbow Falls in afternoon heat is where I've personally run dry more than once, which is not a recommendation, it's a confession. I carry at least 2 liters for the classic route now, more if I'm starting late.

Sun protection: This is genuinely one of the more exposed trails in the area once you're past the tree cover near the Postpile. Sunscreen, and reapply if you're doing the swimming hole at the base of the falls — I've come home looking like a Rainbow Falls victim more than once.

Trekking poles: Not required for the classic route, but worth it on the way back up if your knees complain on descents, and close to essential on the Mammoth Pass connector. Mine mostly live in my car until I need them and then I'm extremely grateful I own them.

Cash: Bring some for shuttle tickets if you're buying same-day and the line for cards is backed up, and remember that tickets originating in the valley itself are cash-only. Learned this one the hard way, obviously.

When to Go

June is early season — snowmelt can mean a fuller, louder Rainbow Falls, but also muddier trail sections and a shorter shuttle schedule on weekends only. July and August are peak — warmest, driest, busiest, and the shuttle runs its full Thursday–Sunday schedule. September is my personal favorite window: thinner crowds, cooler air, and the light on the falls in the late afternoon is hard to beat. Whatever month you go, aim for one of the earliest shuttles out. The difference between an 8 a.m. trail and a 1 p.m. trail here is dramatic, and I have hiked both versions enough times to speak with real authority on this specific regret.

A Few Things I Wish Someone Had Told Me the First Time

• The stairs down to the base of Rainbow Falls are worth it, even though they look like a detour. Don't skip them.
• If you only have energy for one direction after the Postpile, go to Rainbow Falls, not Sotcher Lake. The falls are the better payoff for the effort.
• Plan to be back at your pickup shuttle stop at least 15 minutes early during peak hours. Buses fill up, and drivers will not wait for you, a fact I know from personal, slightly humbling experience.
• Reservations for the morning shuttle sell out on summer weekends. If you have a specific date, book ahead rather than showing up and hoping, which is my usual approach to most things and it does not work here.