Walmsley
All Athletes
Trail & Ultra/Trail

Jim Walmsley

USA
Age
36
Coach
Self-coached
Shoes
Hoka
1×
World Record
4×
Ultra Win
1×
Course Record
1×
National Title

THE STORY

Jim Walmsley is an American ultrarunner widely regarded as one of the most talented trail and ultra-distance runners in history. Born in Scottsdale, Arizona, Walmsley attended the United States Air Force Academy, where he captained the cross country team. After graduating, he served as a nuclear missileer at Malmstrom Air Force Base in Montana before discovering ultrarunning and turning professional.\n\nWalmsley rose to prominence with consecutive JFK 50 Mile victories in 2015 and 2016, earning UltraRunner of the Year honors four straight years from 2016 to 2019. He won Western States 100 four times (2018, 2019, 2021, 2024), setting the course record of 14:09:28 in 2019. In 2023, he became the first American man to win UTMB, finishing in a course record 19:37:43.\n\nA versatile runner across distances, Walmsley set a 50-mile world best of 4:50:07 in 2019 and ran a 2:15:05 marathon at the 2020 U.S. Olympic Trials. He competed in the 2024 Olympic marathon in Paris. Known for his aggressive front-running style and self-coached approach, Walmsley has been based in Flagstaff, Arizona, and more recently in the French Alps.

PERSONAL BESTS

100 Mile (Western States)
14:09:28
Western StatesJun 29, 2019
UTMB
19:37:43
ChamonixAug 26, 2023
50 Mile
4:50:07
Project Carbon XMay 5, 2019
Marathon
2:15:05
AtlantaFeb 29, 2020
Half Marathon
1:04:00
HoustonJan 20, 2019
10,000m
29:08.88

CAREER TIMELINE

2024
Fourth Western States Win and Olympic Marathon
Won Western States 100 for a fourth time in 14:13:45. Later competed in the Olympic marathon in Paris.
2023
UTMB Victory
Became the first American man to win UTMB, finishing in a course record 19:37:43 in Chamonix.
2021
Western States Comeback
Returned to win Western States 100 in 14:46:01 after the 2020 season was cancelled due to COVID-19.
2020
Olympic Marathon Trials
Ran 2:15:05 at the U.S. Olympic Marathon Trials in Atlanta, finishing outside qualifying position.
2019
50-Mile World Best and WS100 Course Record
Set a 50-mile world best of 4:50:07 at Project Carbon X. Won Western States in a course record 14:09:28.
2016
Western States DNF and JFK 50 Record
Went off course while leading Western States 100 but won JFK 50 Mile and earned first UltraRunner of the Year.
2015
JFK 50 Mile Breakthrough
Won the JFK 50 Mile in his first major ultra victory, beginning his rise in the ultrarunning world.

RACE HISTORY

11 results across 7 races
2024
14:13:45
2021
14:46:01
2019
14:09:28
2018
14:30:04
2016
5:21:29
2015
5:47:37
2023
19:37:43
2022
12:58:14
2021
9:46:30
2019
5:12:51
2017
7:23:32

FEATURED IN

4 articles

RELATED ATHLETES

Raced similar events