I'm a California-based author, thru-hiker, skier, paddler and lover of the outdoors. I've written three books for backpackers. "Highs and Lows on the John Muir Trail" was named the Best Outdoor Book by the Outdoor Writers Association of California for 2015. "The Hungry Spork: A Long Distance Hiker's Guide to Meal Planning" was mentioned in the New York Times in "Upscale Food and Gear Bring Campsite Cooking Out of the Wild." My third book, "The Hungry Spork TRAIL RECIPES," was published in 2019. Find my books, info on hiking the JMT and more at Inga's Adventures (https://ingasadventures.com/). For JMT info, join the John Muir Trail Facebook Group where I'm a moderator and we'll answer all of your questions.
It takes a little forethought and planning to eat a high calorie healthy diet of nutrient-rich and delicious food, but it can be done with relative ease, either by enhancing packaged foods or assembling your own from dried ingredients.