The Myra Falls mine is located in a provincial park in central Vancouver Island, British Columbia (view map). The mine is linked by an asphalt road to the port of Campbell River, 90 kilometres away.

There have been over 100 years of mineral exploration activity in central Vancouver Island and over three decades of active mining at Myra Falls.

Active mining has been carried out at Myra Falls since 1966 starting with the Lynx open pit and underground operations, followed in 1969 with the Myra mine. In 1979, the H-W massive sulphide deposit was discovered prompting the installation of new infrastructure and an expansion of the milling facilities to 2,700 tonnes per day. This was later increased to 3,650 tonnes per day. In 1991, the Battle and Gap deposits were discovered. The Lynx underground mine closed in 1993. In 1995, the Marshall deposit was discovered. In 1996, mining in the Battle-Gap zone commenced.

Boliden Limited acquired the Myra Falls operation in January 1998. In July 2004, Breakwater Resources Ltd. purchased all the outstanding shares of Boliden Westmin (Canada) Limited from Boliden Limited.

The mineral deposits comprise complex metal-zoned volcanogenic massive sulphides contained in the 450m thick Myra Formation of the Sicker Group volcanic assemblage. The Myra Formation hosts a geologically diverse collection of mineralized bodies including polymetallic massive sulphides, polymetallic disseminated sulphides, zoned pyritic massive sulphides and stringer sulphide zones. The principal minerals are sphalerite, pyrite and chalcopyrite with minor galena, bornite, tennantite and locally significant secondary copper.