This is my favourite mod track in AC, and the only track I've taken the effort to review. The amount of visual drama it has, when you crest a hillclimb and suddenly...you're diving down into a valley! It is just sublime. I'd go as far as saying it's one of the best tracks I've ever driven in any racing game. If only more fictional tracks realised how much of a rush it is to add verticality and abrupt elevation changes to their routes... It is thrilling how high you climb on this road, and how low you then swoop.
The base AC has a similarly twisty, mountainous track, Trento Bordone, but that is an example of how to take a spectacular environment with lots of beauty and turn it into an ugly, dull drive. Mountain Route does it properly, with a track that constantly throws something new at you at every point. Brilliant.