- Arielle Fitzgerald
- 3:51:25 hour(s):minute(s):second(s)
- Canada (Calgary)
The fastest time to run 50 km on a treadmill (female) is 3 hr 51 min 25 sec, achieved by Arielle Fitzgerald (Canada) at the Calgary Marathon Expo in Calgary, Alberta, Canada, on 28 May 2016.
After taking a three minute bathroom break, Arielle continued running and subsequently broke the Guinness World Records title for the Fastest time to run 100 km on a treadmill (female). She attempted this record as a member of Team MitoCanada, a charity that provides awareness, support, and research for mitochondrial disease in Canada. Team MitoCanada raised $75,000 for mitochondrial research at the Expo.