Trail running races in County Down, Northern Ireland
Find trail running races in County Down, Northern Ireland. Compare 3 upcoming events by date and location. Open a race guide for the course, recorded editions and official entry information where available.
Upcoming running events include 5K races, 10K races and half marathons.
Events to explore include Run Forest Run: Tollymore 5K 2026, Run Forest Run: Castlewellan 5K 2027 and Mourne Way Marathon Events — The Other Way.
4 listed events · 3 with upcoming dates
Upcoming trail running races
3 matching events, earliest date first. Entry availability is shown separately.
Run Forest Run: Tollymore 5K 2026
NIRNewcastle, County Down
Run Forest Run: Tollymore 5K 2026 — Tollymore Forest Park, Newcastle.
· 5K
Race details, entry and past editions →Entry information ↗Run Forest Run: Castlewellan 5K 2027
NIRCastlewellan, County Down
Run Forest Run: Castlewellan 5K 2027 — Castlewellan Forest Park, Castlewellan.
· 10K / 5K
Race details, entry and past editions →Mourne Way Marathon Events — The Other Way
NIRNewcastle, County Down
Mourne Way Marathon Events — The Other Way in Newcastle.
· 42K / Half marathon
Race details, entry and past editions →Race archive
Past races and previous editions
Looking back at a race? Browse the guides below for recorded editions. This section also includes events awaiting a new date and cancelled editions. Previous editions of races in the upcoming calendar are available through their race guides above.
The Bog Run 5K 2026
NIRCastlewellan, County Down
The Bog Run 5K 2026 — Castlewellan Forest Park, Castlewellan.
Next date not listed
Race guide and recorded editions →Choosing a race in County Down
The unfiltered upcoming calendar includes events in Newcastle (2), Castlewellan (1). Use the town filter to compare locations, then check the race guide for the start venue and organiser’s travel information.
Questions about trail running races in County Down
Which trail running races are coming up in County Down, Northern Ireland?
Run Forest Run: Tollymore 5K 2026 is listed for 12 December 2026. Run Forest Run: Castlewellan 5K 2027 is listed for 27 February 2027. Mourne Way Marathon Events — The Other Way is listed for 26 June 2027. Check the race guide and organiser’s latest information before making plans.
What running distances are listed in County Down, Northern Ireland?
Look for 5K races, 10K races and half marathons in the upcoming listings. If an event offers several distances, check the individual race guide to choose the edition and distance you want to enter.
Where can I find race entry details for County Down, Northern Ireland?
Follow the link from the race guide to the organiser or entry provider, where one is available. Check the entry deadline, eligibility and current availability there. A listed race date does not necessarily mean entries are still open.
Why has a race moved out of the upcoming calendar?
Once its listed dates have passed, a race moves to the past-editions view unless another upcoming edition is recorded. Cancelled events also leave the upcoming list. The race guide stays available, and the event returns when a new date is added.