Almost right beside Highway 42 just a few miles north of the Riverhurst Ferry crossing on the east side of the highway. The fun part about taking an aimless drive through rural Saskatchewan is that a lot of older buildings and abandoned places are still standing. Here in Alberta there seems to be an attitude that stuff that is no longer used should be torn down and replaced with new or left. It is very noticeable in Calgary and Edmonton. It seems like both cities are constantly demolishing and rebuilding.
I know nothing about Greenbrier School. I happened across it by accident.