A quick scan of the FKT website will show you that these routes are not all ultra-distance runs. Yes, there are some ridiculously long runs, but there are also routes that you don’t have to dedicate days (or, in some cases, weeks) to in order to complete them. You can even run a few kilometres and, if the route is noteworthy enough, you can get it certified as an official FKT.
For example, look at the Mt. Sanitas route in Boulder, Colo. This is a 1.4-mile (2.25K) run, although it gains almost 400m in that short period of time. This is by no means an easy route to run, and you’ll be gassed by the end of the intense climb, but it’s just a little over 2K. You probably won’t beat the current FKT (it belongs to Kilian Jornet, who completed the run in just over 14 minutes), but if you’re in Boulder and feel like punishing yourself, give it a shot.
On the other end of the spectrum, there are the long FKTs. And when we say long, we mean long. A great example of this is the Appalachian Trail. This 3,500K trail stretches from Maine all the way down to Georgia, and the current route records belong to Belgian Karel Sabbe, who ran farther than anyone else at the 2019 Barkley Marathons (although he still finished with a DNF), and American Liz Anjos. Sabbe set his FKT in 2018, completing the route in just over 41 days, and Anjos ran hers earlier this year, finishing in 51 days.
Try your own
As you can see, you can go super short or extremely long for FKTs. The key to getting your route certified, as listed on the FKT website, is to make sure it is “distinct enough so that others will be interested in repeating it.” It is also noted that, while routes can be any length, “anything less than five miles long or with less than 500 feet of climbing would have to be special.” If you think you’ve got a route that could attract other runners, send it in to the team at fastestknowntime.com. If they like it, run it yourself as the first official record attempt on the route. Once you’re finished, you’ll own an FKT. It might not stay under your name forever (especially if someone like Jornet decides to run it), but you’ll always be the original record holder.