Thru-Hiking the John Muir Trail: The Ultimate, 10-day, Ultralight Plan
By Michael Lanza
Are you planning to thru-hike the John Muir Trail? “America’s Most Beautiful Trail” should be on every serious backpacker’s tick list. After thru-hiking it in seven days, I became convinced that—while a week was very hard—the traditional itinerary of spreading the roughly 221-mile trip out over three weeks or more has a serious flaw: Because of limited food-resupply options, you’ll carry a monster pack that may not only make you sore and uncomfortable, it could cause injuries or other problems that cut short your trip.
Over the years, I’ve evolved from being one of those traditional, heavy-pack backpackers to traveling as light as absolutely possible, and the John Muir Trail is perfect for an ultralight strategy because of its generally dry, late-summer weather, well-constructed footpath, and moderate grades. Fit hikers who arrive with their legs in trail condition can knock off 20 to 22 miles a day—spending about 10 hours a day on the trail (including breaks) and averaging 2.5 mph, a reasonable pace for someone in good shape who’s walking with a light pack.
I’ve laid out below my strategy for a JMT thru-hike spread out over 10 to 11 days. See more advice about planning a JMT thru-hike in the Make It Happen section of my story about our seven-day thru-hike, which has more photos and a video.
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Season A JMT thru-hike can be done from July through September. But the best time for an ultralight thru-hike is mid-August to mid-September, when—usually—the mosquitoes have abated and rain is rare (allowing you to use a tarp instead of a tent), the high passes are snow-free, and mornings are cool.
The Itinerary Fastpacking the JMT isn’t just for the lunatic fringe—ultralight hiking was born here. Our group found seven days doable but extremely hard. More reasonable is 10 to 11 days, because fit hikers capable of averaging 20 to 22 miles a day can, with early-morning starts, still avoid hiking during the worst afternoon heat—and critically, not carry more than five days of food. Here’s how:
• Hike north to south—from Yosemite Valley to Whitney Portal—to gradually acclimate to the highest elevations.
• Start early every day. Hike in the cool morning and evening hours, and rest during the afternoon heat. Knock off most of your day’s mileage by early afternoon. By going ultralight and not cooking, you’ll find that packing up camp takes just minutes. (See more about backpacking only with food that doesn’t require cooking in my article “The Simply Equation of Ultralight Backpacking: Less Weight = More Fun”)
• Plan fewer miles on days when your pack is heaviest, and more miles when you’re traveling lightest.
• Hiking southbound, the hardest and hottest climbs are to Mather Pass, Glen Pass, Forester Pass, and Trail Crest/Mt. Whitney. If possible, do these in the morning.
Do it right with my tips for backpacking lighter and the best thru-hiking backpack.
Click to page 2 (below) to read my resupply plan that will lower your pack weight.
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