There are 9 upcoming 5k races in Hertfordshire listed. Next up: Halloween Hobble: 5K,10K, HALF MARATHON, FULL MARATHON & ULTRA-MARATHON (Saturday, 31 October 2026), Watford Santa Dash (Sunday, 6 December 2026), Inflatable 5K - St Albans (Saturday, 24 April 2027).
Upcoming races only, soonest first. Confirm dates and entry details with the organiser.
Watford Santa Dash takes place in Watford on 06 December 2026. Organised by Watford Mencap. Published venue: Cassiobury Park, Watford WD18 7LG. Check the organiser’s booking page for the full route, start arrangements, age requirements and current entry conditions.
St Albans · Hertfordshire County Show, Dunstable Road, St Albans AL3 7PT, UK
Inflatable 5K - St Albans is organised by UK Running Events in St Albans. Entry options: 5K; 2.5K; 10K; 15K. The course surface has not been confirmed.
Ware · Wodson Park Sports Centre, Ware, Herts, SG12 0UQ
Circuit Du Sore Legs is organised by Zig Zag Running in Ware. Entry options: Bespoke Event Medal - 10k; Bespoke Event Medal - 5k; Bespoke Event Medal - 6 hours; Bespoke Event Medal - Full Marathon; Bespoke Event Medal - Half Marathon; Bespoke Event Medal - Ultra Marathon.
Welwyn Garden City · Stanborough Park, Stanborough Road, AL8 6DF
A 5km obstacle-course fundraising event for Cancer Research UK at Stanborough Park in Welwyn Garden City. Participants can run, jog or walk at their own pace. The course includes climbing, crawling and sliding obstacles. The organiser asks each participant to aim to raise £50.00.
Watford · Cassiobury Park, Off Cassiobury Park Avenue, WD18 7LG
A 5km obstacle-course fundraising event for Cancer Research UK at Cassiobury Park in Watford. Participants can run, jog or walk at their own pace. The course includes climbing, crawling and sliding obstacles. The organiser asks each participant to aim to raise £50.00. Starts are arranged in waves; choose a time when booking.
ATW St Albans Half Marathon #icelollyrun takes place in St Albans on 13 June 2027. Organised by Active Training World. Published venue: Verulamium Park, St Albans AL1 2DL. Check the organiser’s booking page for the full route, start arrangements, age requirements and current entry conditions.
Stevenage · Fairlands Valley Park, Broadhall Way, SG2 8QJ
A 5km obstacle-course fundraising event for Cancer Research UK at Fairlands Valley Park in Stevenage. Participants can run, jog or walk at their own pace. The course includes climbing, crawling and sliding obstacles. The organiser asks each participant to aim to raise £50.00. Starts are arranged in waves; choose a time when booking.
