2025 was a stunningly busy year on the Appalachian Trail. There were many high profile FKT efforts and several DNFs in the final days. Three long-held records did fall however. Sarah Baker set the women’s self-supported northbound time in 74:04:42. Lyla Harrod set the women’s southbound time in 52:18:37.
Fastest Known Podcast
Coming to you every Friday: interviews with FKT-setters and other athletes in the world of Fastest Known Times.
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Episodes
On today’s episode we’re traveling to the High Sierras of California where Caroline Himbert recently set the women’s unsupported northbound record on the premier John Muir Trail. Her first long, unsupported effort was a way for her to go back to her roots as a long distance hiker.
Bears, sheepdogs and snakes…oh my!
Today we’re traveling to possibly the most remote mountain range in the 48 contiguous US states, Wyoming’s Wind River Range. These rugged mountains have more bighorns than people and yet our guest Kelly Halpin finds great joy in traversing them solo and unsupported.
What does the infinity symbol have to do with FKTs?
Well, if you’re in the state of Washington it’s indicative of one of the most challenging mountain routes in the state–Mount Rainier’s Infinity Loop.



