The first person to thru-hike the entire PCT both ways in a single continuous round-trip was Scott Williamson, who completed the "yo-yo" circuit on his fourth attempt in November 2004. Williamson traveled a total of in 197 days, covering an average of per day when not in snow – an overall average of per day – wearing an extremely ultra-lightweight pack, which "without food, weighed about ". Williamson then went on to complete a second round trip on November 28, 2006, cutting two weeks off his 2004 time.
The first person to thru-hike the entire PCT both ways in a single continuous round-trip was Scott Williamson, who completed the "yo-yo" circuit on his fourth attempt in November 2004. Williamson traveled a total of in 197 days, covering an average of per day when not in snow – an overall average of per day – wearing an extremely ultra-lightweight pack, which "without food, weighed about ". Williamson then went on to complete a second round trip on November 28, 2006, cutting two weeks off his 2004 time.