'''''Paso Colchane - Pisiga''''' on the CH15 between Colchane in Region I Tarapacá and Pisiga Bolivar in the Oruro Department. It's at 3700 meters above sea level and the border is open from 08:00 till 20:00 (at least in the summer; we don't know if it's open year-round). The immigration offices are about 100 meters apart and the total distance from town to town is about 2 km. On the Bolivian side is a gas station at the end of town in direction Oruro. Let us know if you hitchhiked this border!
'''''Paso Salar de Ollagüe''''' between Ollagüe in Region II Antofagasta and Avaroa in the Potosí Department in Bolivia. Both villages have a gas station and the distance between immigration offices is 6 km. It's open from 08:00 till 20:00 year-round. The road is made of gravel and there's parallel train tracks. The nearest Chilean city is Calama and in Bolivia it's the city of Uyuni. Let us know if you hitched this border!