Apiza (Boca de).—Lat. 18° 42', long. 103° 44', sea level. The name of the mouth of the Río Coahuayana; sandy beach and coco palms.
Apo.—Lat. 19° 25', long. 102° 25', elev. 2160 m. A village on the western slope of Cerro de Tancítaro; pine-oak forest.
Aquila.—Lat. 18° 32', long. 103° 30', elev. 150 m. A small village on the Río Aquila in the seaward foothills of the Sierra de Coalcomán; tropical semi-deciduous forest.
Araparicuaro.—Lat. 19° 22', long. 102° 12', elev. 1525 m. A village 19 kilometers west-southwest of Uruapan on the trail to Tancítaro; pine-oak forest.
Araro.—Lat. 19° 54', long. 100° 50', elev. 1830 m. A small village at the eastern end of the Lago de Cuitzeo lakebed; mesquite-grassland.
Ario de Rosales.—Lat. 19° 12', long. 101° 42', elev. 1980 m. A town in the Cordillera Volcánica on the road from Pátzcuaro to La Huacana; mixed hardwoods and pine forest.
Arteaga (formerly Carrizal).—Lat. 18° 28', long. 102° 25', elev. 850 m. A town in the eastern part of the Sierra de Coalcomán; transition between arid tropical scrub forest and oak forest.
Atzimba.—Lat. 19° 39', long. 100° 47', elev. 2900 m. A national park in the Cordillera Volcánica, located between Ciudad Hidalgo and Morelia, 32 kilometers by road west-southwest of Ciudad Hidalgo; mixed pine and fir forest.
Axolotl (Rancho).—Lat. 19° 47', long. 100° 38', elev. 2900 m. A settlement on the western slopes of Cerro San Andrés; pine, oak, and fir forest.
Balsas (Río).—A large river having its headwaters in Tlaxcala, Puebla, and northwestern Oaxaca, flowing westward through an arid valley to the Pacific Ocean, and in its lower part forming the boundary between Michoacán and Guerrero.