I hiked the John Muir Trail in 13 Days. People tell me that’s fast, and I guess that it is (although it didn’t really feel fast when I was doing it).
But in August, ultrarunners Hal Koerner and Mike Wolfe set a new John Muir Trail speed record when they finished the trail in 3 days, 12 hours, and 41 minutes — or 3 days, 9 hours, and 5 minutes if they’d started from the summit of Mt. Whitney (technically the southern beginning/end of the John Muir Trail). They traveled south to north — that is, from Mt. Whitney to Yosemite (most people choose to hike the JMT from north to south). But no matter which direction you go, three days is damn fast.