How did I make this (personal) discovery? Simple, we're taking a trip to the Canadian Rockies in August, and I was checking out some possible day hikes. Since Canada is English-French bilingual, all public signs are in both languages. Hence:
So, being so very clever, I whisked over to Google translate just to confirm - check it out:
https://www.google.com/#q=french+for+pass
Hmm, French for pass is 'passer'. Oh wait, how about 'mountain pass'?
https://www.google.com/#q=french+for+mountain+pass
Bingo. And, for extra credit, there's even an audio clip so that you too can properly pronounce 'col' around all your buddies.