DateExpected
Early October 2027
Based on past editions. We'll confirm when the organiser announces.
Venue
Kielder Waterside Park, Kielder, Northumberland, NE48 1BT
Kielder, Northumberland
Countdown
October
A full marathon on trail, once around the edge of Kielder Water. Only 616 m of climbing, so it's a fast, runnable lap rather than a mountain slog.
Key facts
017-hour overall time limit
02Cut-off at the Dam (about 17.25 miles)
03Cut-off at Tower Knowe (about 19 miles)
Create a free training plan for the Altra Kielder Marathon
7-day free trial, no card required
The course
The route
Kielder
Distance42km
Total climb616m
StartElevation
0 kmDrag map to rotate41.3 km
Weather
Early-October, Kielder
13°CTypical high
7°CTypical low
0°CColdest in 20 years
56%Days with rain
Highs around 13°C and lows around 7°C, but it has dropped to 0°C. Rain on 56% of days. Pack for the cold end, not the average.
NASA POWER data, 2006-2025, the week either side of race day
2026 results
Who finishes, and how
#RiderTimeAvg speed
01Nicola Reece03:08:3513.4 km/h
02Chloe Elliott03:14:0913.0 km/h
03Lucie Custance03:17:0312.8 km/h
273
Women finishers
5:00:31
Median time
8.4 km/h
Median speed
Women · 2026 results, as published by the organiser.
How fast could you finish?
Get a prediction based on your recent training
Organiser
Training
Training for the Altra Kielder Marathon
We don't do generic plans. We combine deep knowledge of this race's demands with your recent training, then build a plan with you that progresses as you do.
Beina integrates directly with your existing tools to understand your current fitness, and synchronise your planned sessions.
Intervals.icuWhat a Altra Kielder Marathon plan targets
Typical sessions
42 km with 616 m of climbing
Time on feet and fatigue resistance
Fuelling and pacing for the whole event
What your weeks look like
Typical sessions
Long runs that build time on your feet
Tempo and threshold sessions to hold race pace
Back-to-back weekend runs for fatigue resistance
Not a generic schedule
Typical sessions
Built from your current fitness and the time you actually have
Adapts every week as Beina learns how you respond
Syncs your sessions straight to Garmin and Wahoo
One clear next session, never a wall of spreadsheet
Entries open now
Get your Altra Kielder Marathon plan.
7-day free trial, no card required.
More events in October in United Kingdom
Dartmoor Full Circle 100Expected Early October 2027 · Okehampton→Altra Kielder 10KExpected Early October 2027 · Kielder→Chiltern Hills 100KSat, 2 Oct 2027 · Lye Green→JUST.GRAVEL GrizedaleExpected Early October 2027 · Grizedale Forest→Beat Box HillExpected Early October 2027 · Box Hill Village→Drone Valley Trail Half MarathonExpected Early October 2027 · Unstone Green→
