Geraldton man Royce Hardman and his dog Trigger are walking around Australia together to raise money and awareness for Post Traumatic Stress Disorder.

Royce says he moved to Geraldton after leaving the army. "Perth was too much for me," he says.

"I joined the army when I was 18, and went to Afghanistan at the age of 20. I have seen myself and my friends suffer with PTSD, and I am doing this for all ex and service ADF members."

Royce and Trigger plan to start the trek around September this year, and will be heading off from Perth travelling anti-clockwise. Royce tells us he expects the trip to take one to two years.

Royce says the Facebook page set up for the walk will have information regarding donations in the near future, with "some large charities" being a part of the walk.

Click here to visit and like Trigger's Big Trek on Facebook.