Race detail
Kielder Marathon 2026 Entry, Date & Race Info
Kielder, North East, UK
Last checked: 2 May 2026
Quick summary
The Kielder Marathon is a scenic trail marathon in Northumberland, widely regarded as one of the most challenging marathons in the UK.
Next race
Sunday, 4 October 2026
Location
Kielder, North East
Distance
Marathon
Surface
Road
Upcoming dates
Choose a date and check the latest entry options.
| Date | Start time | Status | Entry |
|---|---|---|---|
Sun, 4 Oct 2026Next race | TBC | Open | Enter Oct |
Race overview
About Kielder Marathon
The Kielder Marathon is a scenic trail marathon in Northumberland, widely regarded as one of the most challenging marathons in the UK. Set within Kielder Water & Forest Park, the race offers a remote, natural route with significant elevation, making it a standout option for runners seeking a tougher alternative to flat road marathons.
The course follows forest trails and lakeside paths around Kielder Water, featuring long climbs, rolling terrain and varied surfaces throughout. While not suited to PB attempts, it delivers a rewarding endurance challenge with expansive views and a unique atmosphere in one of the UK’s most remote race locations.
Part of the wider Kielder Marathon Weekend, the event includes multiple distances and attracts runners looking for a destination-style race experience combined with a strong sense of adventure.
RaceScan tracks entry status, race date, and key race details for the Kielder Marathon in one place.
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Frequently asked questions
Is Kielder Marathon 2026 entry open?
Entries for the 2026 Kielder Marathon are currently open.
When is Kielder Marathon?
Kielder Marathon takes place on Sunday, 4 October 2026.
How can you enter Kielder Marathon?
Entry is currently available through general entry.
What is the Kielder Marathon course like?
The Kielder Marathon is a scenic trail marathon in Northumberland, widely regarded as one of the most challenging marathons in the UK. Set within Kielder Water & Forest Park, the race offers a remote, natural route with significant elevation, making it a standout option for runners seeking a tougher alternative to flat road marathons.
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