According to the latest information available, the boat ramp named Port Williams Road 2499, Sequim is a single-lane concrete boat ramp with a gravel parking area. It has a width of approximately 12 feet and a length of 20 feet. The boat ramp provides access to Sequim Bay, which is a saltwater bay located in the Strait of Juan de Fuca, Washington.

The body of water that the ramp services is suitable for a variety of watercraft, including small boats, kayaks, canoes, and other non-motorized vessels. However, there are no restrictions listed on the kind of craft allowed on the water.

It is important to note that the information given may change over time and it is always recommended to check with local authorities and official sources for up-to-date and accurate information.