According to the latest information available, Warren Road boat ramp (latitude: 33.58542252, longitude: -117.04275513) in Temecula, California is a concrete boat ramp. It is reported to be 20 feet wide and capable of handling small watercraft such as kayaks, canoes, and small fishing boats.

The boat ramp is located on the shores of Lake Skinner, a reservoir in Riverside County, California. Lake Skinner is a popular spot for fishing, boating, and camping, and is known for its largemouth bass, catfish, and bluegill fishing.

The California Department of Fish and Wildlife regulates the use of Lake Skinner, and according to their website, motorized boats are permitted on the lake, but only with a valid California boating license and registration. However, the use of personal watercraft such as jet skis is not allowed on Lake Skinner.

It is important to note that regulations and permitted watercraft may change, and it is recommended to check with local authorities or the California Department of Fish and Wildlife prior to launching a watercraft at Warren Road boat ramp or any other boat ramp in the area.