Ultra Running Hub Denholm, QC, Canada · Saturday, October 3, 2026
Relentless at the Ark Trail Race
Calculated from 50 km alone — the organiser has not published an elevation profile. Read 2.5 as a floor, not a verdict.
What the course asks
DUV results for the 2025 edition (50km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.
Typical conditions, October
Regional 2001-2020 average for October — NASA POWER, grid elevation 265 m. Not a forecast.
Results history
| Year | Race | Finishers | Men's winner | Women's winner |
|---|---|---|---|---|
| 2025 | 50km | 28 | Maxime Hardy · 05:04:54 | Chinchin Wang · 05:51:36 |
| 2024 | 50km | 26 | David Bowman · 05:41:21 | Anna Ananchenko · 07:17:56 |
| 2023 | 50km | 22 | David Bowman · 05:27:48 | Michelle Begin-Major · 08:36:45 |
| 2022 | 50km | 20 | Olivier Garneau · 04:29:38 | Kisa Giebink · 07:19:08 |
| 2021 | 50km | 9 | Stephan Meyer · 06:04:31 | Mary Thompson · 06:04:37 |
| 2020 | 50km | 18 | Mackenzie Palmer · 04:44:50 | Mary Thompson · 05:17:26 |
| 2019 | 50km | 8 | Reme Laprade · 04:46:00 | Tanya Wharton · 06:14:58 |
| 2018 | 50km | 11 | Guy Doiron · 05:15:58 | — |
| 2017 | 50km | 9 | Stephen Meyer · 05:24:38 | Annye Larocque · 07:17:17 |
| 2016 | 50km | 6 | Richard Turgeon · 04:59:02 | Karine Lacombe · 06:28:32 |
The field grew 8% between 2024 (26) and 2025 (28). 11% of the 2025 field were women.
DUV results for the 2025 edition (50km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.
The Aid Station
Course-specific beta from the community
With trail terrain, choose a shoe with moderate cushioning for optimal performance.
Gear for this race
Chosen for 50 km of trail.
- Trail Running Shoes 50 km of trail — cushioning that is still there in the last quarter.
- Race Nutrition 50 km of self-supported fuelling between aid stations.
- Hydration Vests Flask capacity for 50 km, without the bounce.
- GPS Watches Battery life first — a 50 km day outlasts most full-GPS modes.
Overview
The Relentless at the Ark Trail Race is a 50km trail race that has taken place in Denholm, QC, Canada, since 2016. Its 10th edition in 2025 saw 28 finishers. The 2026 race is scheduled for October 3.
This 50km course begins with an 18km gravel road loop. After returning to The Ark, runners complete 3 loops of a 10.5km trail course. With a field size larger than 41% of 2647 comparable 50km races, it offers a mid-sized experience within its peer group.
Similar races
Other 50K trail ultras, closest in distance first.