The boat ramp named Curtola Parkway 139-199 is a public boat ramp located in Vallejo, California. It is situated at latitude 38.09608078 and longitude -122.25769043. The boat ramp is a single-lane ramp that is approximately 20 feet wide and has a length of 100 feet. The ramp is made of concrete and is suitable for launching and retrieving small to medium-sized boats.

The Curtola Parkway boat ramp provides access to the Mare Island Strait, which is part of the San Pablo Bay in Northern California. The Mare Island Strait is a narrow waterway that connects the Napa River with San Pablo Bay. It is a popular spot for boating and fishing, offering opportunities to catch a variety of fish, including striped bass, halibut, and sturgeon.

The boat ramp is open year-round, and there are no fees for using it. The ramp is suitable for a variety of watercraft, including small fishing boats, kayaks, and canoes. However, larger boats may have difficulty using the ramp due to its narrow width.

In summary, the Curtola Parkway 139-199 boat ramp is a public, single-lane concrete ramp that provides access to the Mare Island Strait in Vallejo, California. It is approximately 20 feet wide and 100 feet long and is suitable for launching and retrieving small to medium-sized boats. The ramp is open year-round and is free to use.