The Matanzas River is a tidal estuary located in northeastern Florida. It flows southward from the Atlantic Ocean, separating St. Augustine from Anastasia Island. The river is approximately 20 miles long and is known for its diverse ecosystems, including salt marshes and mangroves. This waterway plays a significant role in the local environment and economy. It supports various recreational activities such as fishing, boating, and birdwatching. The Matanzas River is also home to numerous species of fish and wildlife, making it an important habitat for both aquatic and terrestrial organisms.