Passo Cason di Lanza is a killer up near the Austrian border. I haven't ascended it from the east (Pontebba) since 2010, so I'm long overdue. After driving to Amaro (between Tolmezzo and Moggio) I warmed up on nearly deserted SS13 to Moggio. Here turn north and follow Val Aupa to Selle di Cereschiatis: 12 gradual kilometers along Torrente Aupa then up through the forest for 6km averaging 7%. It's a good workout, followed by a fast descent to Pontebba.
Here starts the Cason di Lanza climb. This too follows a torrent gradually up the valley, then suddenly steepens for 10 km averaging 10% gradient, with several 18%-19% ramps. I used the 30-tooth cog on these. At the passo there's a nice flat spot to catch your breath, then you plummet down the other side. They've covered the numerous drainage channels with tightly-knit grates to prevent tire/wheel destruction. But there is slippery logging waste on the road so watch your speed- I slipped on this stuff in a corner and skinned my knee.
After a long descent you arrive in Paularo, then down the road to Arte Terme. After Tolmezzo I took an interesting detour through Cavasso Carnico to avoid the very fast and busy SS52. Finally reached the car at Amaro and drove home bone-tired.
|Monticello (1362m), Val Aupa|
|Passo Cason di Lanza alpine pond, Monte Zermula (2143m)|
|Cascate after Cason di Lanza|
|Near Austrian border after Cason di Lanza|