6h 29m 25s
In an actual race starting and finishing in the center of Puerto Williams, which adds about 3 (easy) km to the pure loop. 75 finishers.
Race results: https://welcu.com/compete/lse-latitud-sur/navarino-trail?race=50K
Congratulations, it's a wild achievment. But this FKT is not valid as it was done during an official race. Check the FKT Guidelines here: https://fastestknowntime.com/fkt-guidelines
Thanks for pointing this out. We have updated our Guidelines to better reflect how we have been considering things like this. Our previous Guideline ("No official races") was an oversimplification, and we hope it's clearer now.