An item from the Yesterdays Column in the Hungry Horse News.
I believe the boardwalk was first installed in 1971. It was controversial. Some thought it was necessary to preserse the landscape and others thought it was a blight on the landscape:
"50 years ago
Oct. 19, 1973
Jack Potter and Jim McFadyean were putting down fir planks to extend the boardwalk at Logan Pass to the Hidden Lake Overlook. The boardwalk was controversial, but kept people from trampling the meadows at Logan Pass. Potter would go on to be the Chief of Science and Resources in Glacier."