Most of the territory is mountainous, with gradients of over 25%. Altitudes in the territory range from 560 to 1340 masl with an average of 980masl. The mountain formations are subdivided into two parts. The first is a corridor along the border with Jalpan which is over forty km long and five km wide. This area has some very low valleys of only 700 masl. The second area is more rugged with canyons of up to 600 meters deep and peaks which reach over 2000 masl. There are a number of flat areas and valleys which are mostly along the Ayutla and Concá rivers. The principal elevations are Santo Domingo, Cantera, Cofradía, Soledad and Pitorreal.