Lake Miguel Alemán is in the Papaloapan Region of northern Oaxaca state, Mexico.

It was formed by the Miguel Alemán Dam on the Tonto River, and is connected by a channel to the reservoir of the Cerro de Oro Dam on the Santo Domingo River.

[2] The hilltops in the area covered by the lake are now the San Miguel Soyaltepec and Isabel Maria Islands.

Tourist activities include sport fishing, water skiing, rowing and boat tours provided by the local fishermen.

[3] In recent years there has been a re-evaluation of the Papaloapan Project's impact on the environment.