The Mission Bay Drive boat ramp in San Diego, California is a concrete boat ramp that provides access to the waters of Mission Bay. According to the latest information available, the ramp is approximately 30 feet wide, allowing for multiple boats to launch and retrieve simultaneously.

Mission Bay is a saltwater lagoon that covers 4,235 acres and is the largest aquatic park of its kind in the United States. The body of water is popular for recreational activities such as boating, fishing, jet skiing, and paddleboarding.

Various types of watercraft are permitted on Mission Bay, including motorized boats, sailboats, kayaks, and canoes. However, it's worth noting that watercraft operators are subject to certain regulations and restrictions to ensure safety on the water. These include requirements such as carrying proper safety equipment, adhering to speed limits, and avoiding certain areas designated for swimming and other activities.

In conclusion, the Mission Bay Drive boat ramp in San Diego is a concrete ramp that provides access to the waters of Mission Bay. It is about 30 feet wide and can accommodate multiple boats at once. The body of water it services is popular for a variety of recreational activities, and various types of watercraft are permitted on the water, subject to certain regulations and restrictions.