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At the south end of Barreal is a police checkpoint on the RN 149. Catch a ride from there to the Province checkpoint at the crossing of the RN 149 with the road to Parque Nacional El Leoncito and the astronomic observatory CASLEO. It's a large set of buildings with a giant roof for shadow and military dudes who are likely to give you access to the bathroom and a water source. If you're lucky, someone will travel all the way to Uspallata directly from Barreal, but from here you have a great filter to only find traffic going to Uspallata. The road is paved till the province border ('''Limite con Mendoza'''), where the fun bumpy 40 km begins.

[[User:MOAH|Mind of a Hitchhiker]] asked the police and '''bomberos''' (fire people) if she could crash in their (GIANT) garden or in a corner in the building, and was told no. Their building is across from Barreal's only gas station, the YPF at the north end of town.