For some reason I can't locate this in my hike journal, but I recall that we rode the chair lift then climbed the rest of the way to the summit.
Route up: Chairlift, Path to Summit
Route down: Path, Chairlift
I can't remember the first time we went up Prospect Mt., but it was when the kids were young. It was either the 60's or the 70's. We found it very tough at the time.
Route up/down: Prospect Mt. trail