Chacas, the capital of the province, is located about 3,350 m high in the midst of extremely rugged terrain.

The province of Asunción has a land area of 528.66 km² which represents 1.47%]] the territory of the Ancash Region.

In this geographical context, Asunción offers a microclimate for other media, cold during the southern summer rainfall (November to March), although the rains usually extend to other stations for being here in the Sierra north near the jalcas, days of intense solar heat during the months of May, June, July, August and mid September.

The province consists sloping land that are part of the Andean flanks delimiting with other provinces and are of rugged topography, the soils are moderately deep to shallow, medium to low fertility, with both coarse fragments in the profile and on the surface thereof, are highly erodible.

The normal topography is undulating, of slopes ranging from gentle to steep in some areas (especially in the upper parts of Chacas) has plenty of stones on the surface and are of variable shape.