DateExpected
Early July 2027
Based on past editions. We'll confirm when the organiser announces.
Venue
Redbourn Common, Redbourn, Hertfordshire, England
Redbourn, Hertfordshire
Countdown
July
A 90 km gravel loop with 1,250 m of climbing, which is a lot of up for the distance. Expect a solid, self-reliant day on mixed surfaces.
Key facts
01No feed stations: carry your own food and drink
02Unmarked route: you need GPS navigation loaded with the course
037-hour overall cut-off
Create a free training plan for the The Chiltern 100 90 km
7-day free trial, no card required
The course
The route
Redbourn
Distance90km
Total climb1,250m
StartElevation
0 kmDrag map to rotate89.7 km
Weather
Early-July, Redbourn
21°CTypical high
11°CTypical low
6°CColdest in 20 years
40%Days with rain
Highs around 21°C and lows around 11°C, but it has dropped to 6°C. Rain on 40% of days.
NASA POWER data, 2006-2025, the week either side of race day
Results
Course verified. Results not yet available.
Organiser
Training
Training for the The Chiltern 100 90 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 The Chiltern 100 90 km plan targets
Typical sessions
90 km with 1,250 m of climbing
Endurance and fatigue resistance over the full distance
Fuelling and pacing for the whole event
What your weeks look like
Typical sessions
Long endurance rides building toward the full distance
Threshold and sweet-spot work for sustained power
Group rides for drafting and bunch-riding skills
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 The Chiltern 100 90 km plan.
7-day free trial, no card required.
Other races at The Chiltern 100
More events in July in United Kingdom
Winster Hill RaceThu, 1 Jul 2027 · Winster CP→Black Sheep Coastal RushSat, 3 Jul 2027 · Llŷn Peninsula→Chevy ChaseSat, 3 Jul 2027 · Start: top of Ramsey Lane→Great Glen Ultra MarathonSat, 3 Jul 2027 · Fort William→Hardcore 100 Gran FondoSat, 3 Jul 2027 · Dorchester→Lancashire Gravel EpicExpected Early July 2027 · Gisburn→
