Retired university lecturer Dr David Stratton was the first person to explore the park in the TrailRider, a specialised wheelchair designed to make the outdoors more accessible for people with disabilities.

Dr Stratton, who was diagnosed with multiple sclerosis in 1996, described the experience as 'amazing'.

"I could not believe such a thing could be possible," he said.

"Suddenly I was out there, really in the wilderness, picking blueberries off the bushes. It brought tears to my eyes."

Hiking was a favourite past time for Dr Stratton in his childhood and became a passion he shared with his wife Ros in his adult years.

But he had been forced to sit on the sidelines since multiple sclerosis claimed his ability to walk.

Dr Stratton said he was first introduced to the TrailRider during a visit to Canada in 2009.

"A friend of mine spotted it and invited me to try it out," he said.

"The main influence of its development was the former mayor of Vancouver who was a paraplegic. I instantly fell in love with it and when I came to Australia, did everything I could to get it here."

Dr Stratton commenced talks with Parks Victoria and visited Grampians ranger in charge David Roberts to discuss the benefits of the all-terrain wheelchair earlier this year.

Mr Roberts said he thought the idea of all-terrain wheelchairs was perfect for the Grampians.

"It is difficult for persons with physical disabilities to access some of our parks, particularly those in remote and regional areas," he said.

"One of the key reasons has been that tracks, trails and beaches are not suitable for conventional wheelchairs. Some of the most beautiful areas of the state are hard to get to and that's part of their appeal. What this trial is about is making those areas a little more accessible for all."

Parks Victoria sourced funding through the State Government's 'Go For Your Life Initiative' to purchase the TrailRider, valued at $7000.

The organisation has also purchased a beach wheelchair, which will be trialled in other locations later this year.

Dr Stratton said the TrailRider was free to borrow from Halls Gap's Parks Victoria office and could be booked by calling 5361 4000.

He suggested people have three or four helpers to push the chair.