Walk 4:00:00 [3] 11.0 km (21:49 / km) +910m 15:26 / km
GR20 l'Onda - Petra Piana
Set off on the high route but when we got to the ridge, there was a high risk of lightning. So about turned (~40mins) and did the low level route instead. Shame, but not worth the risk. Turned out sunny later on so good chilling at the hut after a short day. Overnight however...gales. We were at 1842m though, so not unexpected! Had to re-peg tent at 1am, and decamped ~5am to save it!!