Nuclear Fallout OCR Races

Nuclear Fallout OCR Races

Saturday, 1 November 2025

Kelvedon Hatch, Brentwood, UK

Follow event Mud/OCR Off Road/Trail Kids

The Nuclear Fallout OCR Races in Brentwood, Essex on 1 November 2025 includes a 6km or 12km distance as well as the Oblivion Samhain endurance OCR challenge.

The 6km (40+ obstacles) is a 1-lap course and the 12km distance is 2 laps of the 6km course. Both are chip-timed. Expect a wide range of natural and man-made obstacles over undulating farmland, in woodland, lakes and bogs. Attempt as many or as few obstacles as you like.

The Oblivion Samhain has competitors complete as many laps of the 6km course as they can in 5.5 hours - this has the potential for up to 35K with 200+ obstacles. See also the Oblivion Extreme held as part of the Nuclear Rush event.

Organiser

Nuclear Races

Distances/Events

Mud / OCR:
6K with 40+ obstacles (14 years+)
12K with 70+ obstacles (17 years+)

Oblivion Samhain - Multi 6K laps in 5.5 hours

Location map

The event village is the Secret Nuclear Bunker, Kelvedon Hatch.

Please note: the map location may be approximate. Refer to the event website for start lines and course maps.

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This listing was last manually checked on 28 May 2025.

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