Extension It has an area of '164.59' square kilometers that places it in the place '81' with respect to the other municipalities of the State. Orography The municipality is located within the morphological region of the 'Sierra Mixteca Baja' which constitutes the southern anticline of the syncline that is part of the Acatlán valley The relief of the municipality shows a rather irregular topography with a slope south–north, with discontinuities such as isolated hills and small mountain ranges, highlight the hills: the Chivato, the Magueyera, Coralillo, Matlatepeque and Loma la Pelada. The height of the municipality ranges between 1,000 and 1,800 meters above sea level. Hydrography The main river that feeds San Pedro is the Petlalcingo, which bathes the north for more than 12 kilometers, serving in a stretch as limit with Acatlán; continues with the valley and joins the Acatlán river, tributary of the Mixteco, one of the main tributaries of the . Gastronomy The main typical dishes of the municipality are: mole poblano and pipían verde with barbecue and pork carnitas. All year long we can find fruits like: Papaya, Watermelon, Mango, Pitaya, Plum, Avocado, Chico Zapote, Tuna and more. And vegetables like: Tomato, Rabano, Cilantro and others. Climate In the municipality three climates are identified: Warm semi-dry, is presented in the west of the municipality. Warm subhumid, with rain in summer, is presented at the center of the municipality. Semi-warm climate, with rains in summer, are identified in the extreme southeast of the municipality. Main Ecosystems Most of the municipality is covered by low deciduous forest associated with shrub and arboreal secondary vegetation that has been gradually dismantled, to be incorporated into the agricultural activity where corn and peanuts are grown, as well as pastures where goats exist. Within the fauna we find: the rattlesnake, scorpion, iguana, chameleon, mazacuata, black and white viper, rabbits, tlacuache, fox, coyote, skunk and raccoon. They have also come to see deer. Economic activity Farming The municipality produces mainly grains such as corn, beans and peanuts; As for the vegetables, pumpkin, green chili, sugarcane, mango, pitaya, plum, avocado and papaya are grown in fruit growing. Cattle raising With regard to this activity, the municipality has goats, cattle, asses, cattle and a variety of birds. Industry Within the manufacturing industry the municipality has manufacturing clothes for women, bakeries, nixtamal mills and others. Commerce At the head of the municipality is a diversified trade,