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37.7 km
~3 days
1319 m
Multi-Day
“Embark on a breathtaking 23.6-mile trek through the Sierra Nevada, weaving through wildflower meadows, past cascading falls, and up to the intriguing Devils Postpile.”
Embarking on the Agnew Meadows to Devils Postpile hike, adventurers will traverse a scenic 38 km (approximately 23.6 miles) journey through the heart of the Sierra Nevada. With an elevation gain of around 1300 meters (approximately 4265 feet), this point-to-point trail is considered difficult and is best suited for experienced hikers.
Getting to the Trailhead
The trailhead is located near Madera County, California, and can be accessed by both public transport and car. During the summer months, the Reds Meadow Shuttle provides transportation from the town of Mammoth Lakes to Agnew Meadows, which is a convenient option for those looking to reduce their carbon footprint. For those driving, parking is available at the trailhead, but it's important to arrive early as spaces can fill up quickly, especially during peak season.
The Journey Begins
Setting out from Agnew Meadows, the trail meanders through lush meadows dotted with wildflowers, offering a gentle start to the hike. The path then leads into the Ansel Adams Wilderness, where hikers are greeted by the towering peaks of the Ritter Range. The trail is well-marked, but carrying a navigation tool like HiiKER is recommended to stay on course and to be aware of any trail updates or changes.
Landmarks and Natural Beauty
As the trail ascends, hikers will encounter the breathtaking Minaret Falls, a perfect spot to rest and enjoy the sound of cascading water. The trail continues to Shadow Lake, a serene alpine lake surrounded by granite cliffs, approximately 8 km (5 miles) from the trailhead. This is a popular spot for a lunch break, with the opportunity to spot local wildlife such as mule deer and the occasional black bear in the distance.
Further along, the trail climbs to a series of switchbacks leading to the John Muir Trail junction. Here, hikers will join the famed John Muir Trail for a portion of the route, experiencing a sense of camaraderie with fellow trekkers.
Historical Significance
The region is steeped in history, with the Devils Postpile National Monument serving as a geological marvel. This unique formation of columnar basalt was created by a lava flow less than 100,000 years ago and later exposed by glacial action. The monument is not only a testament to the Earth's volcanic past but also a symbol of early conservation efforts, having been protected by President Taft in 1911.
Final Stretch and Considerations
Approaching the final stretch, the trail descends into the valley where the Devils Postpile stands tall. Hikers can explore the base of the formation or take a short detour to the top for a different perspective of the hexagonal columns.
Throughout the hike, it's important to be prepared for varying weather conditions and to carry sufficient water and food. The trail can be completed in a single long day for the very fit, but many choose to camp along the way, taking advantage of the designated campsites (permits required).
Remember to practice Leave No Trace principles to preserve the beauty and integrity of this remarkable trail for future generations.
What to expect?
Activity types
Frequently asked questions
How long is the Agnew Meadows to Devils Postpile hike and how hard is it?
Agnew Meadows to Devils Postpile covers 37.73 km, or about 23.4 miles, with 1,319 m of elevation gain, roughly 4,327 feet. It is generally a medium to strenuous multi-day route because the mileage is long and the climbing is significant for a point-to-point hike.
Can the Agnew Meadows to Devils Postpile hike be done in one day?
Agnew Meadows to Devils Postpile is listed as a multi-day hike, and that fits the numbers: 37.73 km with 1,319 m of ascent is a big day even for strong hikers. Fast, experienced hikers may cover the distance in a single push, but most itineraries are more comfortable when split over at least two days.
Where do you park for the Agnew Meadows to Devils Postpile hike?
Parking for access into Reds Meadow Valley is typically handled from the Mammoth Mountain Main Lodge area rather than relying on a space deep in the valley. The National Park Service notes that shuttle parking is near Mammoth Mountain Main Lodge and along the road below the lodge, which is the usual starting point for reaching Agnew Meadows in the main summer season.
Is there a shuttle for the Agnew Meadows to Devils Postpile hike?
Yes. In the main summer season, access into Reds Meadow Valley commonly uses the Reds Meadow/Devils Postpile Shuttle, and the National Park Service states that a mandatory shuttle generally operates between mid-June and mid-September. The shuttle serves Agnew Meadows and Devils Postpile, which makes it practical for a point-to-point itinerary.
When is the best time of year to hike Agnew Meadows to Devils Postpile?
The most reliable season for Agnew Meadows to Devils Postpile is summer into early fall, when Reds Meadow Road is open and shuttle service is running. Devils Postpile National Monument notes that road access is seasonal and the area is typically accessible from around mid-June into mid-October, with winter closures caused by snow.
Can dogs go on the Agnew Meadows to Devils Postpile hike?
Dogs may be allowed on parts of the broader Reds Meadow area and national forest trail system, but rules can change depending on exactly where the route enters Devils Postpile National Monument and what regulations are in effect. Because this hike finishes at a national monument and access rules are managed seasonally, dog access should be confirmed before setting out rather than assumed.
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