Haro region is the most northwestern region of La Rioja, becoming the frontier with Burgos and Alava. His capital, Haro has a 40.32 Km2 area. It is the economic -administrative centre of the judicial party, which includes 49 town councils, including Haro.

Its altitude over sea level (496,50m at the Paz Square) provides a warm climate in summer and a cold and cloudy weather in winter. It is located in the Obarenses mount southern slope, ending in the Bilibio's Crags, which are separated from Cantabria Mountains by Conchas of Haro, composing a morphological unit. From this point, the relief drops quickly towards Ebro Valley.