A two-sided freshwater lake map. Lake Amistad is a Southwest Texas lake, located 155 miles west of San Antonio. Lake Amistad borders Texas and Mexico with half the lake in Mexico and half in Texas. Lake Amistad is one of the best black bass lakes in the United States and Mexico. Many fishing tournaments are held every year in this large lake. The map has GPS numbers for fishing spots, marinas, boat ramps, and other locations.