Lake Pinatubo is the summit crater lake of Mount Pinatubo formed after its climactic eruption on June 15, 1991. The lake is located in Botolan, Zambales, near the boundaries of Pampanga and Tarlac provinces in the Philippines. It is about 90 km northwest of the capital city of Manila. While one paper by researchers from Japan suggested a depth of 600 m, more detailed research suggests that 95–115 m is more accurate.