Oregon ultramarathoner Pam Smith set a world record of 14:11 for 100 miles run on a track at the Desert Solstice Invitational 100-miler run in Phoenix, Arizona December 14.
Smith, 39, cut 14 minutes from Hungarian ultrarunner Edit Bérces' old record of 14:25:45 run in Verona in 2002.
She also took 18 mins off Ann Trason's U.S. record set in 1989. Trason still holds the overall 100-mile world record, having run the distance in 13:47:42 on the road.
Smith averaged an 8:31 pace for the distance
At the same event, Zach Bitter of Madison Wisconsin broke Jon Olsen's U.S. men's 100-mile track record by 12 minutes.
Bitter ran the distance in 11.47, an average 7:04 pace, to better Olsen's 11:59:28 set in Ottawa in September.
Olsen was the first U.S. man to run 100 miles on a track in under 12 hours, breaking Rae Clark's 24-year old record of 12:12;19.
"Records are meant to be broken and I know this mark will be broken in the near future," Olsen presciently wrote immediately after.