Date
Sat, 17 Oct 2026
Start
09:00
Venue
Start: The Morrell Room, Streatley
Streatley, Central Bedfordshire
Countdown
October
A hundred miles on the Ridgeway-style trails, run as four 25-mile out-and-backs that bring you back to the start each time. Only 1,500 m of climbing, but the night does the damage.
Key facts
01Must have finished a 50-mile race inside 15 hours since 1 January 2021
02Minimum age 20 on race day
0328-hour cut-off, with up to 13 hours of darkness
Create a free training plan for the Autumn 100
7-day free trial, no card required
The course
The route
Streatley
Distance161km
Total climb1,500m
StartElevation
0 kmDrag map to rotate152.9 km
Weather
Mid-October, Streatley
15°CTypical high
7°CTypical low
0°CColdest in 20 years
42%Days with rain
Highs around 15°C and lows around 7°C, but it has dropped to 0°C. Rain on 42% of days. Pack for the cold end, not the average.
NASA POWER data, 2006-2025, the week either side of race day
2025 results
Who finishes, and how
#RiderTimeAvg speed
01Sophie Seward18:25:328.7 km/h
02Bonnie Rye19:32:218.2 km/h
03Hayley Langley19:44:238.2 km/h
32
Women finishers
1d 0:11:57
Median time
6.6 km/h
Median speed
Women · 2025 results, as published by the organiser.
How fast could you finish?
Get a prediction based on your recent training
Organiser
Training
Training for the Autumn 100
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 Autumn 100 plan targets
Typical sessions
161 km with 1,500 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 Autumn 100 plan.
7-day free trial, no card required.
More events in October in United Kingdom
Amberaid 30Sat, 17 Oct 2026 · Ashover CP→Langdale Marathon and HalfExpected Mid October 2026 · Field in front of the New Dungeon Ghyll Hotel→The DramathonSat, 17 Oct 2026 · Aberlour→The Maverick Jurassic Coast X-TrailSat, 17 Oct 2026 · Wareham→Monsal Trail October 10KSat, 24 Oct 2026 · Bakewell CP→Monsal Trail October Half Marathon & 10k WeekendSat, 24 Oct 2026 · Bakewell CP→
