Lennox Mountain is an 5,898-foot (1,798 m) mountain summit located in King County of Washington state.

Lennox mountain extends a ridge South towards Canoe peak making a bowl structure where Lake Kanim sits, the origin source of the North Fork of the Snoqualmie River.

From Lennox Mountain a second ridge with rocky double cliffs is formed running East towards Coney's Cones-South Peak where the Coney Basin and Coney Lake sit which produces a tributary of the west fork of Miller River.

[6] Access to Lennox Mountain is from Bare Mountain trailhead which reaches Canoe Peak.

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