When

5 September 2026

Where

Secret Nuclear Bunker, Ongar Road, Brentwood

Address

Kelvedon Hatch Secret Nuclear Bunker, Ongar Road, Brentwood, CM15 9SS, United Kingdom

A fun 5k obstacle course run for all abilities. Mud Family including women’s wave 1.5k 4+ years 5k 7+ years Mud Blast 13+ years