Course
Road-closed half marathon and 10K starting and finishing in front of Knebworth House. The route runs through the grounds of Knebworth Park before heading out onto the surrounding country lanes and back to the house.
Key dates
- !RegistrationOpen now
- ★Race daySun 1 Nov 2026
About
Join us for the 2026 Hertfordshire Half Marathon and 10k in support of Garden House Hospice Care. This ROAD CLOSED half marathon will start and finish at the iconic Knebworth House with the course taking participants around the surrounding rural roads.
Save Hertfordshire Half Marathon & 10K to your season and RunCalendar reminds you the morning entries open and before they close. Free on iPhone, no account needed.
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Marlow Half Marathon, The Frankenstein & Marlow 7
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Witterings Beach Run
A peaceful coastal run along the West Wittering shore
A confirmed date shows its day; a provisional one shows only its month, because we won't claim a day we don't have. This page is rebuilt every night from the RunCalendar catalogue.