Only a few cars use this dead end street (suplying Malga Trat and Rifugio Pernici). If you're headed downhill be careful - you'll be much faster than cars.
In Lenzumo take the road marked #403, an asphalt road (direction: Malga Trat / Rifugio Pernici). Remain on the asphalt, as a marked path branches off. It's a long uphill, but the asphalt is smooth and sometimes you get a nice view. You'll be able to see where you've come from, and where you're going.
It's also possible to get shuttled on this trail; the parking lot is a little bit further past the dirt road.