A Commissioner of Victoria's truth-telling body will embark on foot across 370km of the state from the first-point of colonisation in the state to Parliament House in an effort to share, listen and learn.

Travis Lovett, deputy chair of the Yoorrook Justice Commission, will start the Walk for Truth on May 25, departing Portland Foreshore on Gunditjmara Country in the state's west.

It's expected to be a 25-day journey, passing through culturally and historically significant sites for First Nations people.

The broader Victorian community have been encouraged to join.

"The Walk for Truth is about bringing all Victorians together to share truths, to listen and to learn. It will be truth telling in action and all Victorians are invited to take part," Commissioner Lovett said.

"Over the last four years Yoorrook has heard powerful truths from people right across the state who gave evidence about the past and ongoing impacts of colonisation, as well as the strength, resistance and achievements of First Peoples.  

 "These truths form the basis of Yoorrook's final reports, documenting the past and providing a roadmap to transform the future. 

 "The walk will be a powerful way to build our collective understanding of these truths and our history in Victoria, while walking together towards a better future for all Victorians."

Yoorrook was established to collect the "real" truth of historic and ongoing impact on Indigenous Victorians, in an official record, receiving close to 1500 individual submissions to date, according to their website.

The Commission is due to deliver the final report this year.

Warrnambool, Colac, Geelong and Footscray are some communities along the mapped route Commissioner Lovett, Kerrupmara Gunditjmara man, is taking.

Portland was the first site of European arrival in Victoria, and a site of massacre in the early period post-colonisation.

Of the walk due to begin there, Yoorrook chair Professor Eleanor Bourke invited "all Victorians to join the Walk for Truth, whether it be by walking out on Country" or following online.

"We can't change what happened in the past, but we can understand it better and come together to help create a better future for everyone. I hope you will join us.

"Truth telling has never been more important than it is right now. When we understand the past, and how it connects with the present, we can create a better shared future together."

Commissioner Lovett plans to arrive at the steps of Parliament in Naarm on June 18.