Vinschgau…. Soon to be a victim of its own success.
Firstly, download Trailforks before you get there. All the trails are on there.
The area around Latsch/Laas is where the majority of the classic trails are. Holy Hansen, 36er/Madritschjoch, Sunny Benny, etc…
Not sure if it’s open already, but the lifts at Reschensee (Dreiländereck) are worth a couple of days riding.
Goldsee trail is worth waking up early for (take a shuttle or park your motor up there and leave a bike lock in Prad and get a bus back to the top). No bikes after 10am and the Glunser Alm trail is now off limits for bikes (was a great natural, flow trail).