If it's the same location I'm thinking of, it's where Mirror Lake first comes into view on your left when descending the Main Trail from Trailside Meadow. A couple of years ago during a July hike (the heavy snow year), a buddy and I saw two guys take a shortcut by glissading down the slope immediately adjacent to the left of the Main Trail at this location, and they almost made it all the way to Mirror. It is definitely a significant slope, but at this location the path-like trail is clearly marked. I think I took a photo (or video) of them, and I'll see if I can find it.
Many on this Board and the WPSMB are hoping for a safe return of Mr. Likely and the SAR teams working hard up there.