This will be followed at 12.30pm by a 60km stage from Ranana to Whanganui, travelling down the Whanganui River Rd and finishing at the Multisport clubrooms on Anzac Parade.
Sent off in small groups, the first riders should be there by around 2.30-3pm.
Dean said he has lived abroad for most of his adult life, so he was looking forward to spending the week in his old backyard and "meeting some new faces".
"Exploring any place by bike is always the best way and the opportunity to help out many of our important charities is going to really complete the experience for me.
"I am relishing the opportunity to pedal some of the wonderful roads in our beautiful country and share the experience with competitive and casual riders alike."
As of yesterday, the tour has raised over $250,000 for charity.