10
Runs in Hertfordshire in September 2025
Find runs near me in Hertfordshire in September 2025 - filter by date or location, display on a map or use the advanced search to find your perfect race.
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- Sun 28 Sep
- FREE
- Sun 28 Sep
- FREE
Welwyn Garden City, Hertfordshire, UK
ATW Welwyn Children's Fun Run
A fun 400m run around the sports track just before the half marathon itself - the kids will love it! The parents will love it as a warm up and because it's free.
- Flat
- PB
- Traffic free
- All ages
- 400 m track and field
- Sun 28 Sep
- £35-£37
- Sun 28 Sep
- £35-£37
Welwyn Garden City, Hertfordshire, UK
ATW Welwyn Half Marathon
The popular Welwyn Half Marathon starts and finishes on the impressive 400m athletics track at Gosling Sports Park with an ideal, traffic-free, disused railway line in between.
- Chip timing
- Enter online
- Traffic free
- Age 17 & over
- 13.1 miles road running + 400 ft ascent
- Sun 28 Sep
- £27-£29
- Sun 28 Sep
- £27-£29
Welwyn Garden City, Hertfordshire, UK
ATW Welwyn 10K
The 10K starts and finishes on the impressive 400m athletics track at Gosling Sports Park with an ideal, traffic-free, course in residential and rural areas.
- Chip timing
- Enter online
- Traffic free
- Age 16 & over
- 10 km road running + 190 ft ascent
- Sat 6 Sep
Letchworth Garden City, Hertfordshire, UK
First Saturday of the Month 5K
- 5 km road running
- Sun 21 Sep
Rickmansworth, Hertfordshire, UK
Creative Juices 10K | 10K
- 10 km trail running + 144 m ascent
- Sun 21 Sep
Letchworth Garden City, Hertfordshire, UK
Letchworth 5K | 1 Mile Race
- 1 mile road running