Available distances
About
The North Chilterns 50K is an exhilarating 50 km trail race near Letchworth Garden City, now in its fourth edition, starting at 9am on 21 November 2026. Based at the charming Putteridge Bury estate, it takes runners along a ridgeline course with sweeping views for miles around.
The route winds through beautiful trails and countryside, combining natural beauty with a rewarding endurance challenge. With several stunning viewpoints along the way, including Warden Hill and Barton & Pegsdon Hills, the race promises a memorable adventure for trail enthusiasts.
Prepare for North Chilterns 50K with RunRun
An AI-generated training plan, adjusted every week based on your real sessions. Built around your goal, current level and race date.
- Personalized plan based on your VO2max, history and weekly availability
- Strava and Garmin sync: your sessions are analyzed and the plan adapts
- Target paces, long runs, key sessions: everything is calculated for race day
Races nearby
Other upcoming races around Letchworth Garden City.
Hertfordshire Half Marathon
Nov 1, 2026 · Old Knebworth · 7 mi away
13.1 mi · 6.2 mi
ATW Stevenage Winter Half Marathon & 10K
Dec 13, 2026 · Stevenage · 9 mi away
13.1 mi · 6.2 mi
Fred Hughes 10 Miles
Jan 17, 2027 · St Albans · 12 mi away
10 mi
ATW St Albans New Years Eve 10K
Dec 31, 2026 · St Albans · 12 mi away
6.2 mi
Dirt Half Challenge
Nov 7, 2026 · Linslade · 12 mi away
13.1 mi
ATW Hatfield 5
Nov 29, 2026 · Welwyn Hatfield · 12 mi away
5 mi