The largest lake in Mexico.The volcano choked up.It's 1,800 meters above sea level in northeastern Jalisco.It is about 77 kilometers long and about 16 kilometers between north and south, with an area of about 1,080 square kilometers and an average depth of 10 meters.There are rich freshwater fish and two small islands in the lake.As the tourist attraction the climate is pleasant, the scenery is beautiful.