The race will feature the UK's first ever Rippers category, for 10 and 11-year-olds, free Rockstar energy drink and appearances by top riders, including Fionn Grifiths (Norco World Team) and Joanna Petterson (BTI/Commencal USA).
Organiser Chris Roberts said: "The race was oversubscribed weeks ago with lots of excited new riders all eager to give mini downhill racing a go."
Practice starts at 9am with racing starting at 11am. Riders will get two race runs. For full details, see www.minidh.co.uk.