Just after midnight on June 14, the 25 foot long National Park Service vessel Peregrine ran aground on Lake Superior at the northern end of the Keweenaw Upper Entrance in Hancock, Michigan. The Peregrine was heading to Houghton, Michigan from Isle Royale with 6 persons on board when it struck the breakwater. The United States Coast Guard was contacted and launched the 45 foot long response boat to the scene. There the Coast Guard transferred two passengers, who were being transported from the island to the mainland for medical treatment, to a nearby boat launch where they were met by medical responders.  The Coast Guard returned and safely transferred the remaining park service rangers to shore. No reports of injuries. Reports states the Peregrine was towed to Houghton later that afternoon.  No reports of any pollution was released.  The cause of the grounding and amount of damage to the Peregrine was not disclosed.