Sara Hall and John Raneri set the pace with super fast half marathons!
How fast can you run on a treadmill? Have you ever tried breaking a record or even your own personal best while logging miles on a treadmill? With Covid-19 impacted many events around the world, events such as the Chaski Challenge provide a welcome opportunity for a number of elite athletes to let it fly.

On Saturday June 6, 2020 at the Chaski Challenge, Sara Hall a former middle distance running star at Stanford University really let it fly with a fantastic 69:03 World Half Marathon treadmill record. What is so, WOW! about this time is that it is just slightly off her own personal best time of 68:58! Can you imagine running on a treadmill and being so close to your own outdoor personal best? Too bad Olympics aren’t run on treadmills; Sara may be the gold medalist.
Men’s Half Marathon World Record
In the men’s division, former North Carolina Tar Heel, John Raneri ran the half marathon in 63:08 to set a new World Record. Raneri was a two time NCAA Cross Country Championship qualifier at North Carolina. He also has personal best of 29:48 in the 10k and 14:07 in the 5k.
Other times, included women’s marathon winner, Renee Metivier in a time of 2:40.55 and men’s marathon winner, Tyler Andrews in a time of 2:17.56.
A 100k Anyone?
For those who see a 50 kilometer event as “you are just starting”, how about Mario Mendoza winning the 100km event in 6 hours 39:25. That’s on a treadmill.