Rose Island Lighthouse & Fort Hamilton Trust Share: Tours and Rentals Rose Island Lighthouse & Fort Hamilton Trust Visit Website PO Box 1419 Newport, RI 02840 (401) 847-4242 Facebook Hours: April - October, 10 AM - 4 PM. Arrive by Jamestown-Newport Ferry or on our launch, Rose or by paddle About Map About Rose Island Lighthouse & Ft Hamilton Trust is a 501 (c) (3) tax-exempt organization whose mission is to preserve the historic and environmental integrity of Rose Island and maintain the lighthouse.