Bridport's Connor Burns, 10, will ride at least 250 kilometres to raise money for charities fighting children's cancer.
This is the third year Connor has participated in the Great Cycle Challenge.
Last year he rode over 300 kilometres and raised $3276, despite having a major accident 11 days into the challenge which required dental surgery.
Connor was not to be deterred, according to his mother Sheree Burns.
"He exceeded his goals well and truly last year," she said.
"That put him out of action for a couple of weeks, and he still got back on and smashed out everything that he set out to do.
"We're extremely proud."
He is dedicating his rides to a 17-month-old boy who passed away from cancer this year, named Ivar.
Connor was also selected as one of the inaugural GCC Champions.
Donate to Connor's effort at greatcyclechallenge.com.au/riders/connorburns