• The contrast between soft roads in the Santa Rosa de Calamuchita Valley and rocky, narrow tracks in the Traslasierra mountains. 
  • Sandy gravel roads become heavily rutted for the second pass and moving out of the ‘rails’ can pitch a car off the road. 
  • Many river crossings in the valleys which become wide and deep in wet weather. 
  • Early autumn in the southern hemisphere brings a risk of fog and possibly even ice in the mountains.