Pacific Rim Mining Corp, through its subsidiaries, engages in the acquisition, exploration, and development of precious metals properties. It owns a 49% interest in the Denton Rawhide Mine, located near Fallon, Nevada; a 100% interest in exploration license areas, known as El Dorado and La Calera, located in El Salvador; and exploration interests in mineral claims in the United States. Denton-Rawhide Mine is an open pit gold-silver heap leach mine. The company was formed in 1985 and is headquartered in Vancouver, Canada.