High Quality Content by WIKIPEDIA articles! La Blanca is a pre-Columbian Mesoamerican archaeological site in present-day Retalhuleu Department, western Guatemala. It has an occupation dating predominantly from the Middle Preclassic (900-600 BC) period of Mesoamerican chronology, and at its peak was one of the largest known Mesoamerican sites of that era. It is located on the western Pacific coast, where it rose to become the major regional center following the decline of an earlier polity at Ojo de Agua. La Blanca`s regional dominance appears to have lasted approximately three centuries, until it was eclipsed by Ujuxte, 13 km east. The site had the highest pyramid in the Pacific Lowlands at 25 meters high.