This chapter argues that the Late Classic/Epiclassic ceramic style known as Coyotlatelco has roots in the eastern El Bajío of Near West Mexico. Coyotlatelco became a widespread ceramic tradition in Epiclassic Central Mexico. Its chief defining characteristic is its suite of unsupported and tripod-supported vessels decorated with red-painted geometric designs on plain brown or cream slipped pottery. Ceramic data and radiocarbon dating produced from Tulane University’s Ucareo-Zinapecuaro (U-Z) Project (1989-1995) shed additional light on the ongoing debate regarding whether or not the Coyotlatelco style originates with the native population or if it shows evidence of the migration of non-local people into the central highlands of Mexico. The ceramic chronology for the U-Z source area throughout the Late Formative and Classic periods in NE Michoacan begins a discussion about shared decorative modes among red on brown ceramic types that connect Michoacan with societies in both the El Bajio and the Basin of Mexico regions, including Teotihuacan. The conclusions drawn suggest that the Coyotlatelco ceramic style has deep roots in the pottery traditions of the eastern El Bajio and, given the equally long history of various modes of regional and back migration, there seems little need to look beyond Central Mexico for the origins of Coyotlatleco.