The San Andreas Trail boat ramp in San Bruno, California is a popular launch point for boaters and watercraft enthusiasts. According to the latest available information, it is a standard concrete boat ramp that measures approximately 20 feet in width, making it suitable for most types of watercraft.

The San Andreas Trail boat ramp provides access to the San Francisco Bay, a large body of water that is home to a wide range of marine life and recreational activities. Boaters can use this ramp to launch their boats, kayaks, canoes, and other watercraft to explore the bay's waters and shoreline.

As for the types of watercraft permitted on the water, the San Francisco Bay area is regulated by the California Department of Boating and Waterways (DBW). According to the latest information from the DBW, all types of watercraft are permitted on the bay, including motorized boats, sailboats, kayaks, canoes, and jet skis.

It's important to note that boaters and watercraft enthusiasts should always check with local authorities and the DBW before launching their craft to ensure that they are in compliance with all current regulations and safety requirements. Additionally, boaters should always practice safe boating techniques and be mindful of other water users to ensure a safe and enjoyable experience for all.