Nariño is a department of Colombia named after independence leader Antonio Nariño. Its capital is Pasto. It is in the west of the country, bordering Ecuador and the Pacific Ocean. Nariño has a diverse geography and varied climate according to altitude: hot in the plains of the Pacific and cold in the mountains, where most of the population resides, a situati…Nariño is a department of Colombia named after independence leader Antonio Nariño. Its capital is Pasto. It is in the west of the country, bordering Ecuador and the Pacific Ocean. Nariño has a diverse geography and varied climate according to altitude: hot in the plains of the Pacific and cold in the mountains, where most of the population resides, a situation that is repeated in a north-south direction. Other important cities include Tumaco and Ipiales.