The main goal of this trip is to plant at least 8,000 native trees in Australia. However, it's also a chance for the four young men to explore the country and spread the message about climate change and sustainability.
"This adventure is driven by our passion for cycling and our will to make a positive difference for the environment," one of the cyclists Nick Scaife said in a statement released today (July 4).
Now just over a month since leaving Darwin, the four cyclists - Nick along with Tommy Gurr, Jimmy McGee and Markus Schorn - have travelled 2,000 kilometres and are making an important stop in Broome.
Here they will meet with the President of the Shire, Graeme Campbell, who is a proud supporter of their mission.
"The Shire of Broome is really happy to be able to support the four riders and the cause they're highlighting, and we wish them well for the rest of their journey," Mr Campbell said.
Nick also commented, saying that the ride so far had been great and he was appreciative of all the support.
"It's been an amazing ride so far! We've been touched by the fantastic support we've received from people we've met along the way," he said.
"We're very thankful to the people and organisations who have made a donation towards the charity Greenfleet to help plant native trees in Australia," he added.
From Broome, the boys will continue to head south hugging the coast and are expected to arrive in Adelaide by the end of August.
Another fit and motivated cyclist is also jumping on his bike for a charity organisation, this time supporting a Unicef cause.
Harley Ison is a 20-year-old student training to be a physical education teacher and he is hoping to raise $1,000 for Unicef's East Africa Appeal by cycling from Melbourne to Sydney.
The young man said he was excited to tackle the challenge and looked forward to working with the Australian charity to help support malnourished children over in Africa.
"I can't wait for the challenge to present itself," he said in a statement yesterday (July 3).
"I am ready to take on a new chapter in my life and I believe we can make a small but significant difference together," he added.
If all goes to plan, he will be finishing his bike ride and arriving in Sydney on Friday (July 6).