Costa Grande of Guerrero is a sociopolitical region located in the Mexican state of Guerrero, along the Pacific Coast. It makes up 325 km (202 mi) of Guerrero's approximately 500 km (311 mi) coastline, extending from the Michoacán border to the Acapulco area, wedged between the Sierra Madre del Sur and the Pacific Ocean. Acapulco is often considered part of the Costa Grande; however, the government of the state classifies the area around the city as a separate region. The Costa Grande roughly correlates to the Cihuatlán province of the Aztec Empire, which was conquered between 1497 and 1504. Before then, much of the area belonged to a dominion under the control of the Cuitlatecs, but efforts by both the Purépecha Empire and Aztec Empire to expand into this area in the 15th century brought