It has been speculated through a census that the estimated population of Pasto is around 450,000. The establishment of Pasto of Colombia dates back to the year 1539. It was Lorenzo de Aldana, a robust explorer of Spanish origin, who had laid the foundation stone of this Colombian city under the name of San Juan de Pasto. This city had served to be the cultural and religious center of its times and in doing so earned the designation of 'Theological City of Colombia'. Pasto at Colombia had been entirely secluded from the rest of the country immediately after its independence. But with the passage of time, it became a livelier city.
Manufacture of furniture and production of dairy products formed an important part of the economy of this Colombian city. It shares a healthy trade relationship with Ecuador as well.
The 'Blacks and Whites' Carnival' is perhaps the most cherished and revered carnival in Pasto. It takes place on two consecutive days of 5th and 6th January. During this event, the residents throw talcum powder, party foam on each other and paint their partners with glowing cosmetic colors.