110-yard world-record share
Completed 110 yards with Ivo Steyaert and Frank Gielen at Belgium’s satellite championship, setting a new world-best mark as Belgium won the team title.
Source-checked athlete record · Updated Oct 12, 2026
Merijn Geerts
Five-time 100-yard runner and former backyard world-record co-holder
Merijn Geerts is a Belgian backyard specialist with five performances of at least 100 yards and a personal best of 110.
BelgiumWilseleM50–54
The record so far
Merijn Geerts is a Belgian ultrarunner from Wilsele whose backyard career combines exceptional depth with repeated appearances at global championships. His current best is 110 yards, achieved at both the 2024 Belgian satellite championship and the 2026 Legends Backyard Ultra.
Geerts has reached at least 100 yards five times: 101 in 2022, 100 in 2023, 110 in 2024, 102 in 2025, and 110 in 2026. His 2022 and 2024 performances formed part of shared world-record progressions before later results moved the overall mark higher.
He also races continuous six-day events, covering 807.986 km at the 2025 GOMU Six-Day World Championship in France and 761.314 km at the 2026 EMU 6-Day Race in Hungary. He is second on Belgium’s official selection list for the 2026 Backyard Ultra World Team Championship, which starts on 17 October.
Defining performances
Performance history
| Date | Event | Performance | Result | Source |
|---|---|---|---|---|
| EMU 6-Day RaceSix-day roadThe Balatonfüred race also hosted the GOMU 6-Day World Championship. | 761.314 km | 10th overall | View ↗ | |
| Legends Backyard UltraBackyard ultra | 110 yards · 737.660 km | 3rd overall | View ↗ | |
| Big Dog’s Backyard UltraBackyard ultra | 88 yards · 590.128 km | 13th overall | View ↗ | |
| Dead Cow Gully Backyard UltraBackyard ultra | 102 yards · 684.012 km | 3rd overall | View ↗ | |
| GOMU Six-Day World ChampionshipSix-day race | 807.986 km | 8th overall | View ↗ | |
| Backyard Ultra Team World Championship — BelgiumBackyard ultraGeerts, Ivo Steyaert 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 | 100 yards · 670.600 km | 6th overall | View ↗ | |
| Backyard Ultra Team World Championship — BelgiumBackyard ultraGeerts and Ivo Steyaert 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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