Uncovered since Roman times? But I am constantly being told that today is the hottest the planet has been for over 125k years... When did the Romans live again. Someone is lying to you. #ClimateScam #DrillBabyDrill 
Discussion
Of course, there is barely any information available from anything mainstream, but intriguing.
Was hoping to find some information on how it was used. If it was only used in summer seasons or did they hike over in the winter, etc? May hunt around later. The ebb and flow of the climate.
Sources: https://traveltomorrow.com/global-warming-melts-swiss-mountain-pass-unseen-since-roman-times/
https://culturacolectiva.com/en/history/tsanfleuron-pass-switzerland-ancient-roman-path-uncovered/
Google Maps link: https://maps.app.goo.gl/rfJC4jKtQ6Uf1UQXA