Cuesta de Bonilla
Cuesta de Bonilla is a high mountain pass at an elevation of 3.110m (10,203ft) above the sea level, located in the Andes, in the Argentinian Mendoza Province.
The road to the summit is called Ruta Provincial 13. It’s gravel and rocky. 4x4 recommended. It’s a very steep trail. The road is said to have 365 turns. With such a high summit altitude the road can be closed anytime due to snowfalls. The zone is prone to heavy mist and can be dangerous in low visibility conditions.