It takes about one-and-a-half hours. Landowner Mr Reid was a public-spirited and community-minded man, Mr Brown said, and the walk was worthwhile.
"The view from the lookout is stunning - a great panorama out over the city and the river.
"He wanted to share that," Mr Brown said.
Now that it is gazetted, Wanganui District Council is the walkway's controlling authority.
Council workers have been replacing and painting marker posts, and the council has installed a sign in Kelvin St.
Garmac Engineering has made a new metal gate, to mark the new status.
That will be "opened" in a ceremony at 12.50pm on Monday. A member of the New Zealand Walking Access Commission is to attend.
The Rotary Club of Wanganui would continue to be involved with the track, Mr Brown said. More work in Matipo Park is planned, and the walkway could eventually be extended to Westmere and then Castlecliff.