Seymour Inlet[1] is one of the lesser travelled of the principal inlets of the British Columbia Coast. Unlike larger inlets such as Knight or Bute, it is not flanked by mountains but by relatively low, but still rugged, coastal hill-country and forms a maze of complex, narrow waterways and tidal pools and lagoons. It is located within a corresponding maze of peninsulas on the mainland on the northwest side of the Queen Charlotte Strait region.
Seymour Inlet has its own side-inlets, the largest being a south arm named Frederick Sound (also named for the governor), with a side-inlet of its own named Salmon Arm. Another is an unnamed inlet in the southwest corner, 12 km (7.5 mi) in length with its own side-inlets, including Nenahlmai Lagoon and Whelakis Lagoon. Seymour Inlet does not open directly onto the Queen Charlotte Strait but is accessed via Slingsby Channel and Schooner Channel, which are the passages on either side of Bramham Island.
At the entrance in Seymour Inlet, between Johnson Point and Hervell Point, are the Nakwakto Rapids, one of the fastest tidal rapid in the world.[3]