Diamond Lake Boat Ramp is a single concrete ramp located on the southeast end of the lake near the public beach, operated by Mundelein Park District and requiring a permit fee for use.

The ramp provides access to a 153-acre glacial lake suitable for power boating, fishing, and water sports, with a boat launch dock typically installed by April 1st and removed after November 1st.

Permit holders receive a key to the gated launch area, and a ranger hotline (847-450-3063) is available for assistance; note that all boats must comply with Illinois DNR registration and boating safety requirements.