Date
Sat, 25 Sept 2027
Venue
Henley Showground, Henley-on-Thames
Henley-on-Thames, Oxfordshire
Countdown
September
A friendly 10 km loop with 235 m of climbing, open from age 8. A good first trail race, or a family day out with the big-distance runners sharing the showground.
Key facts
01Minimum age 8; under 18s must be accompanied by an adult participant
Create a free training plan for the Chiltern 50 Ultra Challenge 10 km
7-day free trial, no card required
The course
The route
Henley-on-Thames
Distance10km
Total climb235m
StartElevation
0 kmDrag map to rotate10.0 km
Weather
Late-September, Henley-on-Thames
19°CTypical high
9°CTypical low
4°CColdest in 20 years
38%Days with rain
Highs around 19°C and lows around 9°C, but it has dropped to 4°C. Rain on 38% of days.
NASA POWER data, 2006-2025, the week either side of race day
2026 results
Who finishes, and how
#RiderTimeAvg speed
01Linda ROBERTS00:54:3311.0 km/h
02Tracey ALLEN01:01:389.7 km/h
03Tori FLAHAVAN01:04:229.3 km/h
72
Women finishers
2:07:02
Median time
4.7 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
OrganiserUltra Challenge Ltd (Ultra Challenge; also associated with Action Challenge)
Websiteultrachallenge.com
Instagram@ultrachallenges
Running since2014
Training
Training for the Chiltern 50 Ultra Challenge 10 km
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 Chiltern 50 Ultra Challenge 10 km plan targets
Typical sessions
10 km with 235 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 Chiltern 50 Ultra Challenge 10 km plan.
7-day free trial, no card required.
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