What is the John Muir Trail? 

The John Muir Trail (JMT) is a long distance trail in the Sierra Nevada mountain range of California, passing through Yosemite, Kings Canyon and Sequoia National Parks. From the northern terminus at Happy Isles in Yosemite Valley and the southern terminus located on the summit of Mount Whitney, the Trail's official length is 210.4 miles. For almost all of its length, the trail is in the High Sierra backcountry and wilderness areas. For about 160 miles, the trail, named for naturalist John Muir, follows the same footpath as the longer Pacific Crest Trail.

The vast majority of the trail is situated within designated wilderness. The trail passes through large swaths of alpine and high mountain scenery, and lies almost entirely at or above 8,000 feet in elevation. About 35% of the trail, including the entirety of the last 30 miles, lie above 10,000 feet. The trail has been described as "America's most famous trail"; known for its relative solitude, the trail sees about 1,500 thru-hiking attempts each year (including Pacific Crest Trail thru-hikers), much fewer than the number of attempts on comparable walks such as the southern portion of Appalachian Trail or the Way of St. James.

The idea of the 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. State Engineer Wilbur F. McClure was responsible for selecting the final route. He secured the cooperation of the United States Forest Service, which managed and supervised much of the actual construction. The California state legislature made additional appropriations of $10,000 each in 1917, 1925, 1927 and 1929.

After the Depression began, assistance from the California state government came to an end, and there were still two difficult sections yet to be completed. One was the connection from the Kings River to the Kern River over Forester Pass, at an elevation of 13,153 feet (4,009 m). The Forester Pass section was completed in 1932 as the result of a joint effort between the Forest Service and the National Park Service. The Forest Service completed the final section at Palisade Creek (in the Palisade Group) in 1938. 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.

(source: Wikipedia)