Mr Blair will carry out a fundraising run on August 24 to help the family of three-year-old Charlotte Rataj, who has been diagnosed with leukaemia.

The dedicated Devonport man has helped out other Coastal children suffering from illness in the past by taking part in fundraising runs for Phoebe Berwick, Seth Crowden and the late Hayden Connelley.

"In a way I feel honoured that these families allow me to help them, it is all about locals helping locals." Mr Blair said.

This fundraising run is the longest Mr Blair has tackled and is set to take him an exhausting 10-12 hours.

"I will get through it, it is nothing like what these children have to go through."

Mr Blair first heard of Charlotte through his wife, who teaches her to swim, and knew he had to help out.

"There is not a lot that anyone can do in a situation like this, but fundraising will make their journey a little bit more comfortable, and will take away some of those worries they don't need."

Mr Blair is encouraging local primary and high school students to help Charlotte by taking part in a 1, 2 or 3km run, which will be held on August 25, the day after Mr Blair's run, or to help out with the organisation process.

Schools will be contacted soon to be provided further information.

This community involvement highlights the immense support of North-West Coasters, as was seen last Sunday when a fundraising concert was held to help Charlotte and her family.

Nathan Hudson, frontman of Sydney band Faker performed at the Devonport Surf Club, with the event raising $5700 for the Rataj family.