My longest hole-out was a 119 yard hole-in-one. It was from an elevated tee, so I was able to watch it hit the green, take the break and find the bottom of the cup.
I've also holed out from about 100 yards, twice. Both times were for an eagle 2, and both times the green was slightly elevated so I couldn't see the ball go in.
Also, I've holed out from about 40 yards to save par.
What's your longest hole-out?