Bowknot Lake is a small alpine lake in Custer County, Idaho, United States, located in the Sawtooth Mountains in the Sawtooth National Recreation Area. Sawtooth National Forest trial 096 leads to Bowknot Lake.

Bowknot Lake is in the Sawtooth Wilderness, and a wilderness permit can be obtained at a registration box at trailheads or wilderness boundaries. Toxaway Lake is upstream of Bowknot Lake while Farley Lake, McDonald Lake, and Yellow Belly Lake are downstream.

• List of lakes of the Sawtooth Mountains (Idaho)
• Sawtooth National Forest
• Sawtooth National Recreation Area
• Sawtooth Range (Idaho)