Drivers AtlasThe world's best roads

Colombia, Tolima and Caldas

Alto de Letras

Eighty kilometres of unbroken climb, the longest continuous ascent on earth.

Length

80 km

In miles

49.7 mi

Driving time

2 hr

Atlas rating

9.0 / 10

Driving quality8.9
Scenery9.0

The run

Mariquita to Manizales, following the Route 50. Drive it in either direction, though the views usually favour the climb.

Season

Fog above 3000 metres most afternoons

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Checked by the Drivers Atlas desk

Scored and written by the Drivers Atlas editorial desk, drawing on driven routes across the UK and Europe, mapping data and member road reports. Every road in the library carries a driving and scenery score set by the same method. How we score roads.

Last reviewed 11 April 2026