SUDBURY -- Buck Miller and two others are planning to embark on a gruelling journey across the far north on 'fat bikes' in early March to raise money for charity.

The retired professional road cyclists, including Eric Batty and Ryan Atkins, are departing from Peawanuck First Nation to Gillam, Manitoba, a 750 km journey.

They're attempting to be the first team to ride fat bikes, self-supported the entire length of the "world's longest winter road" according to the Guinness Book of World Records.

"We’ve all been training like crazy and we’re more fit now than we’ve been in the summer," said Miller. "We’re also working on our diet, eating healthy, but still eating a lot."

They will be traversing the rugged terrain on fat bikes and carrying very few supplies.

Their goal is to raise $10,000 for True North Aid's work in remote Indigenous communities across the north.

Last year, the trio's James Bay Descent Expedition raised $8,000 for the Moosonee Native Friendship Center. The journey in 2019 was a 600 km ride from Attiwapiskat First Nation to Smooth Rock Falls.

The journey this year is expected to take them 14 days.

A fat bike is an off-road bicycle with oversized tires, usually at least 3.8 inches or wider. Fat bikes enable riders to cycle through soft and unstable terrain, such as snow, sand or mud.