The natural starting point for this climb is in San Pietro di Cadore (955m), but one could also start up at Presenaio (978m) a bit further on the road to Sappada. I do recommend to take the virtually unknown road (at least until now ;-)) via Valle as it is both harder, more interesting, even less traffic and with nice views. Also you get great views by going down the other road via Costalta! The road becomes hard in the wooded section that is seldom found on maps, but it is very easy to find the right road here (all without signs) and the surface is not very good here, but otherwise it is very good. Just before the pass, you meet the road from Costalta and the pass is just above the rifugio/restaurant here. The other side down to Val Visdende is possible wth a road bike, but it is a gravel road for some kilometres.