The Dunwich Dynamo is an annual semi-organised, through-the-night bicycle ride from London Fields park in Hackney, London, England to Dunwich on the Suffolk coast. The distance is approximately 120 miles. This racing bicycle is built using lightweight, shaped aluminium tubing and carbon fiber stays and forks. ... Challenge riding is a form of cycling where the riders challenge themselves rather than each other. ... London Fields at twilight. ... Hackney is the principal area of the London Borough of Hackney in East London. ... This article is about the British city. ... Royal motto (French): Dieu et mon droit (Translated: God and my right) Englands location (dark green) within the British Isles Languages None official English de facto Capital None official London de facto Largest city London Area – Total Ranked 1st UK 130,395 km² Population – Total (mid-2004) – Total (2001... Dunwich (IPA: ) is a town in the county of Suffolk in England, the remnant of what was once a prosperous seaport and centre of the wool trade during the early middle ages, with a natural harbour formed by the mouths of the River Blyth and the River Dunwich. ... Suffolk (pronounced SUF-fk) is a large traditional and administrative county in the East Anglia region of eastern England. ...

The ride (usually abbreviated to "Dun Run" or "DD") takes place overnight, hence "Dynamo". It is scheduled to take place on the Saturday night closest to the full moon in July, partly for tradition but also because it is easier to ride by moonlight (bicycle lighting systems being of limited power). Dynamo can refer to more than one item. ...

The DD used to include mechanical support and "controls" where riders had to check in to ensure no short-cuts. Nowadays it is free and unsupported. The route is planned by the London School Of Cycling and transport back from Dunwich at the end of the ride is arranged by Southwark Cyclists.

The 2006 Dun Run starts on 8 July at approximately 9pm from The Pub On The Park, London Fields.

Some Dun Runners have posted their ride reports online:

From 2002: http://www.ravenfamily.org/sam/bike/dunrun2002.html

From 2003: http://www.ravenfamily.org/sam/bike/dunrun2003.html

From 2004: http://www.nuttycyclist.co.uk/rides/dun-run-1.htm

See also

• Challenge riding
• Brevet or Randonnée