Join Jnetics for the 2026 Hertfordshire Half Marathon at the iconic Knebworth House!
The route takes in the grounds of Knebworth Park before heading out to the surrounding country lanes. This ROAD CLOSED course gives you the opportunity to enjoy the rural roads totally traffic free – this is the first mass participation event with closed roads staged at Knebworth House!
Registration fee: £35
Minimum Fundraising target: £450
Please complete the form below to register your interest in running for Jnetics. A member of our team will get back to you within 48 hours to confirm your place.
