At km 129, the canyon becomes narrow. The next tunnel uphill is the #34 whose exit is dug in the face of a vertical cliff, right in front of the famous "Puente Infiernillo" bridge.
Tunnel 33 uphill exit: Km 129.91, Alt. 3313m (10870 ft)
Out of Tunnel 34, onto Infiernillo bridge, right before entering tunnel 35...
A switchman is jumping off the (moving) lead engine as the train approaches the switchback between San Mateo and Rio Blanco.
1009 and 1008 are on their way to Rio Blanco, closely following the Carretera Central in this section.
A lucky shot - the sun had reached the bottom of the valley only a few minutes earlier. 1003 is crossing the Carretera Central twice over this steel bridge just before arriving at Rio Blanco.
FCCA no. 1008 and 1009 cross a bridge between San Mateo and Rio Blanco. The steel bridge underneath is an old road bridge.
1008 and 1009 are on their way to the summit, pictured between San Mateo and Rio Blanco, where the line crosses the valley and the road over this steel bridge.