What would be the difference in mileage/elevation if a rider chose to leave the mountains to the south, say near Lugano, and rejoin somewhere near Treviso? It's probably too big a detour to be worth it. That said, it looks like Hippy's just turned south...
I think he's more likely to head to Lugano, then across the top of Lake Como, then up the Valtellina through Aprica and over the Passo del Tonale to Cles, then onto CP3 from there.
What would be the difference in mileage/elevation if a rider chose to leave the mountains to the south, say near Lugano, and rejoin somewhere near Treviso? It's probably too big a detour to be worth it. That said, it looks like Hippy's just turned south...