Sonora Island is located off the mid-east coast of
Vancouver Island. Fierce tidal channels surround the island, which was considered, until the 1870s,
Valdes Island, along with
Quadra and
Maurelle islands—these three islands did not receive their individual names until 1903.
1The 174 square km Sonora Island was named after the
Sonora, an 11 m Spanish vessel that sailed west coast waters in the 1770s.
2