Trail running races in Northern Ireland
Find trail running races in Northern Ireland. Compare 10 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 half marathons, marathons, 10K races, 5K races and 20 mile races.
Events to explore include Run Forest Run: Tollymore 5K 2026, Race Over the Glen and Rabbit Run.
Narrow your search to Antrim, County Down and County Antrim, or browse the other locations below.
12 listed events · 10 with upcoming dates
Upcoming trail running races
10 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 ↗Race Over the Glen
NIRGlenariff, Northern Ireland
10K trail running in Glenariff.
· 10K · Status TBC
Race details, entry and past editions →Rabbit Run
NIRBallycastle, Antrim
Rabbit Run — 10K, Half, Marathon.
· 10K / Half marathon / Marathon
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 →Endurancelife Giant’s Causeway
NIRPortrush, Antrim
Endurancelife Giant’s Causeway — 20mi.
· 20mi
Race details, entry and past editions →Entry information ↗Bridgedale Mourne Coast 2 Coast Marathon
NIRRostrevor to Newcastle, Newry, Co. Down, NI
Running event in Rostrevor to Newcastle, Newry, Co. Down, NI.
· Marathon · Status TBC
Race details, entry and past editions →Norn Iron 100
NIRBallintoy, Antrim
Norn Iron 100 — 106mi, 37mi, Half.
· 106mi / Half marathon · Status TBC
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 →Ballycastle to Waterfoot Trail Marathon
NIRBallycastle, Antrim
Ballycastle to Waterfoot Trail Marathon — Marathon.
· Marathon · Status TBC
Race details, entry and past editions →Newcastle Way Marathon & Half Marathon
NIRNewcastle / Castlewellan, Down
Newcastle Way Marathon & Half Marathon — Half, Marathon.
· Half marathon / Marathon · Status TBC
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.
Giant's Causeway Coast Marathon 2026
NIRPortballintrae, County Antrim
Giant's Causeway Coast Marathon 2026 — an officially published half-marathon fixture at Causeway Coast.
Next date not listed
Race guide and recorded editions →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 Northern Ireland
The unfiltered upcoming calendar includes events in Ballycastle (2), Newcastle (2), Ballintoy (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 Northern Ireland
Which trail running races are coming up in Northern Ireland?
Run Forest Run: Tollymore 5K 2026 is listed for 12 December 2026. Race Over the Glen is listed for 1 January 2027 (status to be confirmed). Rabbit Run is listed for 13 February 2027. Check the race guide and organiser’s latest information before making plans.
What running distances are listed in Northern Ireland?
Look for half marathons, marathons, 10K races, 5K races and 20 mile races 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 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.