Date
Sun, 3 Jan 2027
Start
09:00
Venue
Wenchford Picnic Site, New Road, Blakeney Straits, between Blakeney and Parkend, Gloucestershire GL15 4AW
Forest of Dean, Gloucestershire
Countdown
January
Run the seven-hill muddy forest loop twice. The Immortal Sinner is the long version of a course people have been running since 2010, and the second lap is where it bites.
Key facts
01Minimum age 14
02Two-hour cut-off at 7 miles (the end of lap one)
03Two laps of the seven-mile course
Create a free training plan for the The Seven Sins Run & Immortal Sinner 23 km
7-day free trial, no card required
The course
One lap, on repeat
Forest of Dean · one lap
Distance23km
Start · finishOne lap · elevation
0 kmDrag map to rotate11.8 km
Weather
Early-January, Forest of Dean
7°CTypical high
2°CTypical low
-8°CColdest in 20 years
47%Days with rain
Highs around 7°C and lows around 2°C, but it has dropped to -8°C. Rain on 47% of days. Pack for the cold end, not the average.
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 Seven Sins Run & Immortal Sinner 23 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 Seven Sins Run & Immortal Sinner 23 km plan targets
Typical sessions
23 km
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 The Seven Sins Run & Immortal Sinner 23 km plan.
7-day free trial, no card required.
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