Written Directions
From Tortoli take SS 198 direction Lanusei. In the village follow directions for Gairo (villanova) and then Osini, keep following SS198. Once in Osini, almost at the end of the village, leave the main road and follow for "Scala di San Giorgio" area.
Scenery
The route crosses the ghost village of Gairo vecchia (Old Gairo) up to Osini, to then climb up to the mountain top where you'll enjoy a breath taking view of all the surroundings, down to the sea, 40 km away.
Drive Enjoyment
Very difficult curvy road for 1/3 after Lanusei. To Lanusei clean pavement and good grip. After the road was told me to be dirty, but I found it quite ok. From Osini to the mountain top there's a tiny road in the forest, not good for biking, but it's only about a mile, and the view you get from the top is worth the 5 extra minutes.
Tourism Opportunities
As most of Sardinia the area is almost living in another era. You can find a few springs along the road where you can drink excellent water, but that's almost it. Food and nice drinks are only in Tortol.