Pasillo (English: little step, hallway or aisle) is a Colombian genre of music popular in the territories that composed the 19th century Viceroyalty of New Granada: Born in the Colombian Andes during the independence wars, it spread to other areas; especially Ecuador (where it is considered the national musical style) and, to a lesser extent, the mountainous regions of Venezuela and Panama. Venezuelans refer to this style of music as "vals" (Spanish for "Waltz"). Today, it has incorporated more European features of classical dance, such as Viennese waltz in Colombia and features of sanjuanito and yaraví in Ecuador. As it spread during the Gran Colombia period, pasillo also absorbed the individual characteristics of isolated villages. This gives it an eclectic feel; however, the style, tone, and tempo of the music differ in each village and indeed between each country.
In its waltz, pasillo alters the classically European dance form to accompany guitar, mandolin, and other string instruments.
UNESCO's representative list of the Intangible Cultural Heritage of Humanity includes Pasillo from 2021.[1]