Adam River is a river on northern Vancouver Island, British Columbia, Canada, flowing north into the Johnstone Strait northwest of the community of Sayward. The Adam's main tributary is the Eve River.[1] The Kwak'wala name for the river is He-la-de, meaning "land of plenty", a reference to abundant berries, birds, game, and salmon.[2] That name is reflected in that of Haylahte Indian Reserve No. 3, which is on the east bank of the Adam's mouth.[3] The former Matilpi village of Klaywatse was located on an island in the river's estuary.[4]