- Desiree Linden
- 2:59:54 hour(s):minute(s):second(s)
- United States (Eugene)
The fastest run 50 km ultra distance by a female athlete is 2 hours 59 minutes 54 seconds, by Desiree Linden (USA) on 13 April 2021 in Eugene, Oregon, USA.
Linden, a former winner of the Boston Marathon, became the first woman to break the 3-hour barrier for 50k – in her very first ultramarathon-distance run. She averaged 5:47 per mile, along a deserted bike path outside Eugene, Oregon, during the Brooks 50K & Marathon event.