ATAC Resources Ltd., an exploration stage company, engages in the acquisition, exploration, and evaluation of mineral properties in Canada and the and United States. The company primarily explores for gold, silver, lead, copper, and zinc deposits. Its flagship property is the 100% owned Rackla project covering an area of approximately 1,700 square kilometers located in the Mayo Mining District of Yukon Territory. ATAC Resources Ltd. was incorporated in 1998 and is headquartered in Vancouver, Canada. As of July 10, 2023, ATAC Resources Ltd. operates as a subsidiary of Alexco Resource Corp.