Ready to take on the feat of running from the Devonport Bluff to Bondi Beach in Sydney, Mr Blair can't wait to lace up his sneakers.

Along with a support crew and his mate Shane Taylor, the pair will be running the equivalent of three marathons a day, and 13 cyclists will also be showing their support by riding from Melbourne to Bondi, all in the name of charity.

Funds raised along the way will go to not-for-profit organisation Tim Blair Run for Kids, which uses the funds to help sick kids across the Coast.

"You can only train for a certain amount of time, and I've been ready for four months," he said.

"I just said to my wife I wish I could get on the boat and go.

"I have been doing lots of interviews and that is great (to get the message out there) but that is not why I do this.

"I do it to help people and I struggle with all the publicity, hence why I just want to get out there and run.

"I am just a man that runs, and nothing is possible without the support of my family and everyone that donates and supports us, they are the champions.

"I really want to thank everyone and I don't know how I can repay everyone."

Mr Blair said he was anticipating long days ahead, although he is prepared.

"It is good therapy (running) I do a lot of thinking, I think about how lucky I am, and I think about my dad and my mum.

"Obviously there are times when it starts to hurt, and you have to channel your thoughts into something more positive.

"The emotions really do go up and down and that is what ultra endurance is, it is a roller coaster of emotions."

By hitting the pavements and garnering community support, Tim Blair has already raised tens of thousands of dollars.

He has individually helped Coastal children and their families including Phoebe Berwick, the late Hayden Connelly, Seth Crowden, Charlotte Rataj, and most recently Trystan Stephens.

"At the end of the day I do it because I enjoy it, and as a parent you are given the biggest job in the world bringing up and looking after your children,.

"And in turn making sure those that are less fortunate in life are also looked after is so important."

The aim of the Bluff to Bondi run is to raise $100,000.

To donate visit www.everydayhero.com.au/event/run-for-kids.