Viadal Ultra Six Days winner
Won the Swedish six-day race with 813.335 km in 2025 and retained the title with 738.321 km in 2026.
Source-checked athlete record · Updated Oct 12, 2026
Ivo Steyaert
113-yard Big’s assist and former backyard world-record co-holder
Ivo Steyaert is a Belgian backyard ultrarunner with a 113-yard personal best and three performances beyond 100 yards.
BelgiumOosterzeleM55–59
The record so far
Ivo Steyaert is a Belgian backyard specialist from Oosterzele. He set his personal best of 113 yards at the 2025 Big Dog’s Backyard Ultra, finishing as the assist to Phil Gore’s 114-yard win.
Steyaert was also part of the shared world-record progressions at Belgium’s satellite championships, completing 101 yards in 2022 and 110 in 2024. His broader backyard record includes wins in Germany and Belgium and appearances across Europe, the United States, and Mexico.
He is also a six-day racer: he won the Viadal Ultra Six Days in Sweden with 813.335 km in 2025 and again with 738.321 km in August 2026. He tops Belgium’s official selection list for the 2026 Backyard Ultra World Team Championship, which starts on 17 October.
Defining performances
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Big Dog’s Backyard assist
Reached 113 yards, finishing second to the 114-yard winner.
110-yard world-record share
Completed 110 yards with Merijn Geerts and Frank Gielen at Belgium’s satellite championship, setting a new world-best mark as Belgium won the team title.
101-yard record progression
Shared the then-world-record distance at Belgium’s team championship.
Performance history
| Date | Event | Performance | Result | Source |
|---|---|---|---|---|
| Viadal Ultra Six DaysSix-day race | 738.321 km | Winner | View ↗ | |
| Legends Backyard UltraBackyard ultra | 84 yards · 563.304 km | 8th overall | View ↗ | |
| Big Dog’s Backyard UltraBackyard ultra | 113 yards · 757.778 km | Assist · 2nd overall | View ↗ | |
| Viadal Ultra Six DaysSix-day race | 813.335 km | Winner | View ↗ | |
| Non Stop Backyard HuatuscoBackyard ultra | 40 yards · 268.240 km | 3rd overall | View ↗ | |
| Backyard Ultra Team World Championship — BelgiumBackyard ultraSteyaert, Merijn Geerts and Frank Gielen stopped together after 110 yards, so there was no individual winner or assist. | 110 yards · 737.660 km | Shared world-best mark · team champion | View ↗ | |
| Big Dog’s Backyard UltraBackyard ultra | 80 yards · 536.480 km | 15th overall | View ↗ | |
| Backyard Ultra Team World Championship — BelgiumBackyard ultraSteyaert and Merijn Geerts both stopped after 101 yards, so there was no individual winner or assist. | 101 yards · 677.306 km | Shared then-world record | View ↗ |
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