Tomahawk Lake is a lake located in the town of Blooming Grove, New York, USA. It is a reservoir, created in 1929 by damming Cromline Creek, which converges with Otter Kill elsewhere in the town to form Moodna Creek, a tributary of the Hudson River. It is privately owned, and regulated by the homeowners' association and access both as a water supply and recreational resource is restricted to its members. Two roads cross the lake, and public fishing access is limited to the lake up to 50 ft from the centerline of these roads. Limited parking is available on Hulsetown Road South of the junction with Cherry Hill Road.