A record number of cyclists from across the British Isles will contest the Isle of Man Youth Cycling Tour which begins in Douglas on Friday at 18:00 BST, organisers have said.
This year 373 cyclists between the ages of five and 18 have signed up to take part in the three-day event.
A Tour spokeswoman said many of the categories have been "oversubscribed".
All riders will start the event with a prologue time trial held along Douglas promenade.
Last year Joe Evans from Staffordshire took the junior overall title from local rider Matthew Bostock.
Isle of Man Cycling secretary Emma Gell said: "The event continues to grow in popularity and it is reflected in another record year."
Over the years the Isle of Man Youth Tour has produced Olympic, World, European and British champions including Mark Cavendish and Peter Kennaugh.
Gell said: "It starts with the time trial and then moves on to the roads. It caters for all ages and abilities, from novices through to British champions."
Road races are scheduled for the Saturday and Sunday on closed roads.