Blennerhassett Island State Park is located in the Ohio River near Parkersburg, West Virginia. The park features a historic mansion, which was once the home of Harman and Margaret Blennerhassett, who were prominent figures in the early 19th century. Visitors can explore the island by taking a ferry ride and enjoy various recreational activities such as hiking, picnicking, and birdwatching. The park also offers guided tours of the Blennerhassett Mansion, showcasing its rich history and beautiful architecture. Additionally, the island is home to scenic trails and lush landscapes, making it a popular destination for nature lovers and history enthusiasts alike.