Through the early 20th century, Hunter Island became a popular summer destination with hotels and extensive camping grounds welcoming upwards of 500,000 visitors in the peak seasons by 1917. Following the mansion’s demolition and park improvements, the island’s natural areas gained recognition for their ecological value. In 1967, the Hunter Island Marine Zoology and Geology Sanctuary was established, preserving the island’s unique salt marshes, exposed bedrock, and marine habitats. Today, the island hosts the Kazimiroff Nature Trail and remains a vital part of Pelham Bay Park’s conservation and educational efforts.