The St Marks National Wildlife Refuge - Aucilla River boat ramp is a popular boat launch site located in Florida. It is a concrete ramp that is wide enough to accommodate two boats at a time. The ramp is also equipped with a courtesy dock that extends out into the water, making it easier for boaters to launch and retrieve their watercraft.

The boat ramp provides access to the Aucilla River, which is a popular spot for fishing, kayaking, and other recreational water activities. The Aucilla River is known for its clear water and diverse fish species, including bass, bluegill, and catfish.

The St Marks National Wildlife Refuge - Aucilla River boat ramp is open to the public year-round, and there are no fees to use the ramp. However, visitors are required to have a valid Florida fishing license if they plan on fishing in the area.

As for the type of craft that are permitted on the water, the boat ramp is suitable for small to medium-sized boats, including kayaks, canoes, and motorboats. However, larger boats may have difficulty navigating the river due to shallow areas and low-hanging branches.

The information provided above is accurate as of the time of writing, based on the latest available information from the St Marks National Wildlife Refuge website.