DateExpected
Mid September 2027
Based on past editions. We'll confirm when the organiser announces.
Venue
Zapato Brewery, Holme Mills, West Slaithwaite Road, Marsden, Huddersfield, HD7 6LS
Marsden, West Yorkshire
Countdown
September
A short, friendly trail run around Marsden: one loop, mostly off-road, with a modest 290 m of climbing. Easy to say yes to if you fancy a proper muddy morning.
Key facts
01Minimum age 16
02Chip-timed, so your time is recorded automatically
03Course is marshalled, about 85% trail and 15% road
Create a free training plan for the Darkwood Demon
7-day free trial, no card required
The course
The route
Marsden
Distance9.7km
Total climb290m
StartElevation
0 kmDrag map to rotate9.6 km
Weather
Mid-September, Marsden
17°CTypical high
9°CTypical low
3°CColdest in 20 years
47%Days with rain
Highs around 17°C and lows around 9°C, but it has dropped to 3°C. Rain on 47% of days.
NASA POWER data, 2006-2025, the week either side of race day
2026 results
Who finishes, and how
#RiderTimeAvg speed
01Margaret Beever0:47:2512.3 km/h
02Lucy Taylor0:49:5111.7 km/h
03Amy Sanderson0:53:5910.8 km/h
64
Women finishers
1:10:06
Median time
8.3 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
OrganiserSlaithwaite Striders RC
Websiteslaithwaitestriders.com
Instagram@slaithwaitestriders
Running since2024
Training
Training for the Darkwood Demon
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 Darkwood Demon plan targets
Typical sessions
10 km with 290 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 Darkwood Demon plan.
7-day free trial, no card required.
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