Bristol Orienteering Klub (BOK.) was formed in 1971 by the amalgamation of two small clubs, Henbury Rutters (Henbury School) and Bristol Footpads (British Aerospace & Rolls Royce).
The aim of the Klub is to promote the sport of orienteering in Bristol and the surrounding area, and to provide teams for inter-club competitions. With a membership of about 300, BOK is one of the largest clubs in the United Kingdom.
In 1977 members of BOK and teachers in Avon inaugurated the Avon Schools Orienteering Association, now called the Avon Schools Orienteers (ASO).
The Klub is administered by an elected committee. They meet regularly to arrange Map Production, Fixture Planning. Training & Development and the Social Programme, as well the general running of the Klub.