Well ay least I got the "hillclimb" part right!
Which, of course, I didn't! I had never heard of the event, so I just did some research, and realise it was a kind of rally based on Trento, and comprised 4 legs starting and finishing there, each leg comprising fast regularity stages and timed hillclimbs. You really learn stuff on AP. And there's a book published about the event - possibly where this photo comes from?