Калифорния тауларындағы ежелгі жолдар және Джон Мьюир атындағы жол тарихы

Trail in the Sierra Nevada mountains of California
the trail in California

Prior to the arrival of European American settlers, the Paiute people living in the High Sierra region utilized a series of ancestral trails for hunting and trade with neighboring indigenous groups. In an effort to acknowledge the original people who traveled this region, some modern Native American and environmental organizations recognize the JMT as Nüümü Poyo, which translates to "Paiute Road," "Paiute Trail," or "People's Trail."

The idea of a trail along the backbone of the High Sierra originated with Theodore Solomons. Solomons later recalled that the concept originated in his adolescence. "The idea of a crest parallel trail came to me one day while herding my uncle's cattle in an immense unfenced alfalfa field near Fresno. It was 1884 and I was 14." He began advocating construction of the trail shortly after the Sierra Club was founded in 1892. John Muir was a founding member and first president of the Sierra Club. Solomons explored the area now known as the Evolution Basin, and traveled extensively throughout the High Sierra, exploring possible trail routes. Joseph Nisbet LeConte took up the cause in 1898 and the proposed trail was originally called the "High Sierra Trail", although that name was later given to a different trail, running in the east–west direction. LeConte spent years exploring the canyons and passes of the Kings River and Kern River, and climbing peaks along the proposed trail. Along with James S. Hutchinson and Duncan McDuffie, he pioneered a high mountain route in 1908 from Yosemite National Park to Kings Canyon, roughly along the route of the modern JMT. In 28 days, they completed a trip of 228 miles through the high mountains, including several previously unexplored sections. In 1914, the Sierra Club appointed a committee to cooperate with the State of California to begin construction of the trail. John Muir died later that year, and the proposed trail was renamed in his honor.

Construction of the JMT began in 1915, a year after Muir's death, with a $10,000 appropriation from the California legislature and Governor Hiram Johnson. State Engineer Wilbur F. McClure was made responsible for overseeing the project and selecting the final route, though he secured the cooperation of the United States Forest Service, which managed and supervised much of the actual construction, and LeConte was very influential regarding the eventual routing of the trail. The California state legislature made additional appropriations of $10,000 each in 1917, 1925, 1927 and 1929. This section passes by the headwaters of the Middle Fork of the Kings River and over Mather Pass by the "Golden Staircase" to the headwaters of the South Fork of the Kings River. Shortly after, this section was incorporated into newly created Kings Canyon National Park. The entire project had taken 46 years to complete. William Edward Colby, the first secretary of the Sierra Club, called the finished trail "a most appropriate memorial to John Muir, who spent many of the best years of his life exploring the region which it will make accessible." From Tuolumne Meadows the trail turns south, running parallel to the main range of the Sierra Nevada, through Yosemite National Park, Inyo and Sierra national forests (including the John Muir Wilderness and Ansel Adams Wilderness), passing through Devils Postpile National Monument, Kings Canyon National Park, and ending on Mount Whitney in Sequoia National Park. From the southern terminus of the JMT at the summit of Mount Whitney, an additional 10.6 mile (17 km) hike on the Mount Whitney Trail is required to reach the nearest trailhead at Whitney Portal, thus making an end to end traverse of the JMT effectively 221 mile (356 km).

The trail begins at the Happy Isle bridge near the Happy Isles Nature Center. The trail ascends steeply up a paved incline before crossing another bridge meeting with the junction with the Mist Trail. The trail continues along a cut into Panorama Cliff, called the "Ice Cut". Although broad and well traveled, hazardous winter conditions and close proximity to civilization (attracting large numbers of day hikers) make this one of the most dangerous parts of the trail. The trail continues into Little Yosemite Valley, past the trail junctions to Half Dome and Cloud's Rest, and then into a subalpine basin and passing the Sunrise High Sierra Camp. The trail then crosses the Cathedral Range at Cathedral Pass before dropping steeply into Tuolumne Meadows, a common resupply point. The trail passes a visitor's center and some campgrounds before linking up with the Pacific Crest Trail. The John Muir Trail/Pacific Crest Trail then turns south, through the mild Lyell Canyon meadow, and crosses the Cathedral Range again and exits the park at Donahue Pass. From the summit of Mount Whitney, the closest trailhead is Whitney Portal. at 4040 feet (1231 m). The highest point on the trail is the southern terminus, Mount Whitney, at 14505 feet (4421 m), A large portion of the trail is more than 10000 feet (3048 m) high, including the entirety of the last 30 mile (48 km). When the United States Geological Survey calculated the official length of the trail, elevation gain and loss was not taken into consideration. The total amount of ascent of the trail is around 46000 feet (14021 m). According to Hipcamp and the John Muir Trail Foundation, the total descent of the trail is 38000 feet (11582 m); however, Backpacker estimates the total descent as 2,000 feet less, at 36000 feet (10973 m). This produces a total of about 84000 feet (25603 m), or almost 16 mile (26 km); however, this does not mean the total length is increased by 16 mile (26 km). Rather, the triangle inequality implies that the error due to neglecting elevation changes underestimates the true length by no greater than this value. According to Backpacker magazine, in total, the trail gains 47,000 feet (14326 m) in elevation.

The primary hiking season is usually from July through September; during this time, most of the snow from the previous year has melted, but new snow hasn't fallen yet. The record for the fastest known time was set by ultrarunner François D'Haene in 2017, who ran from south to north in two days, 19 hours, and 26 minutes. The previous record of three days, seven hours, and 36 minutes was set by Leor Pantilat in 2014. The record for the fastest trip in an unsupported way was set by Aurélien Sanchez in 2018, who ran from south to north in three days, three hours, and 55 minutes. The previous record of three days, ten hours, and 59 minutes was set by Andrew Bentz in 2014. A permit is required to hike the JMT, which can be obtained from the national park or forest where the hiker begins the hike, and is available 168 days in advance. This single permit is valid for the entire hike. Permit reservations can be hard to obtain for JMT thru hikers, but a portion of permits are reserved for walk ins. The Whitney Portal end of the JMT has a lottery for wilderness permits, and hikers starting in Yosemite face competition with other backpackers simply wanting to camp overnight while hiking Half Dome or to Tuolumne Meadows. Backpackers entering the Sierra backcountry on multi day trips are generally required to carry their food in approved hard sided storage containers known as bear canisters to protect their food and other scented items from theft by black bears, which are common in the region. About 90 96 percent of hikers hike north to south, from Yosemite Valley to Mt. Whitney. There are advantages to starting in Yosemite Valley and hiking south. Although there is a significant net altitude gain this way, starting at a lower altitude allows the hiker time to acclimate to the elevations of the trail rather than immediately having to tackle a 6,000 foot (1,800 m) climb to the summit of Mount Whitney. In addition, there are several resupply points convenient to the JMT during its northern half (Tuolumne Meadows, Reds Meadow, Vermillion Valley Resort, Muir Trail Ranch), allowing the hiker to carry a lighter food load early in the hike and also to exit the trail easily if problems arise. The southern half of the JMT is more remote and generally higher in elevation, thus making it more appropriate for the second half of the hike when maximum conditioning has been attained.