How to enter
30th edition - Sunday 23 November 2014, Norfolk Showground
This year's race reached capacity on Friday 3 October when the last of the 3,150 regular places was sold.
The minimum age is 17 years on race day. No devices with headphones or earbuds may be worn while racing.
This race has a half-way time limit of 90 minutes - anyone failing to reach the half-way mark inside 90 minutes on race day will be directed to retire and not allowed to continue.
The 31st edition of this event will take place on Sunday 22 November 2015 and details of how to enter will appear here soon.