Big Dog’s Backyard Ultra overall winner
Completed 60 yards for 402.360 km, becoming the first woman to win the original backyard ultra outright.
Source-checked athlete record · Updated Aug 17, 2026
Maggie Guterl
First woman to win Big’s and Cocodona 250 champion
Maggie Guterl is an American ultrarunner who won the 2019 Big Dog’s Backyard Ultra outright and the inaugural Cocodona 250 in 2021.
🇺🇸 United StatesDurango, ColoradoW45
The record so far
Maggie Guterl is an American ultrarunner based in Durango, Colorado. In 2019 she became the first woman to win Big Dog’s Backyard Ultra outright, completing 60 yards for 402.360 km and outlasting the entire field.
Guterl added another defining long-distance victory at the inaugural Cocodona 250 in 2021, finishing first woman and seventh overall in 3 days, 13 hours, 30 minutes, and 38 seconds. Her public results also cover 24-hour racing and mountain 100-milers including Hardrock and Run Rabbit Run.
Those results connect three distinct disciplines: fixed-time racing, backyard ultras, and mountain events extending beyond 200 miles.
Defining performances
Performance history
| Date | Event | Performance | Result | Source |
|---|---|---|---|---|
| April Foolish 10 Hour Endurance Trail Race10-hour race | 51.499 km | 19th woman | View ↗ | |
| Run Rabbit Run 100100-mile trail | 25:27:20 | 8th woman | View ↗ | |
| Hardrock Hundred Endurance Run100-mile trail | 39:29:27 | 11th woman | View ↗ | |
| Big Dog’s Backyard Ultra World Team ChampionshipsBackyard ultra | 42 yards | 2nd woman | View ↗ | |
| Cocodona 250250-mile trail | 3d 13:30:38 | Winner · 7th overall | View ↗ | |
| Big Dog’s Backyard UltraBackyard ultra | 60 yards · 402.360 km | Overall winner | View ↗ |
Related coverage
Runner directory
More athlete records
Mark DowdleBackyard specialist and 2026 Arrowhead 135 championHendrik BouryGerman backyard record holder and elite 48-hour runnerNorman Mascher-AspensjöBack-to-back German 24-hour championMartin StillerGreenLoop winner and Last Soul final-five runnerAyyoub El OsroutiLast Soul assist with front-of-pack road speedHarvey LewisTwo-time Big’s champion and Badwater 135 winner