After conducting research, I was unable to find any information regarding a boat ramp named Boating Site: Mosquito Lakes in Washington with the provided latitude and longitude coordinates. It is possible that the information may be outdated or incorrect.

However, I can provide general information about boat ramps in Washington. Boat ramps vary in size and width, typically ranging from 10 feet to 60 feet wide, and may accommodate different types of watercraft. The body of water that a boat ramp services can also vary, from small lakes and ponds to large rivers and bays.

In Washington, the Washington State Parks and Recreation Commission manages many boat ramps throughout the state, including those located in state parks. These ramps typically accommodate a variety of watercraft, including motorized boats, canoes, kayaks, and paddleboards. It is important to note that regulations and restrictions may vary depending on the specific location and body of water.

To obtain more accurate information about a specific boat ramp or location, I recommend checking with the managing agency or conducting further research with up-to-date resources.