In 2012, Superstorm Sandy devastated the Park, damaging and destroying hundreds of trees. A particularly affected area was the secluded Vale of Cashmere, a hidden Park gem.

The Alliance received $1.2 million in funding from the National Parks Service through the Hurricane Sandy Disaster Relief Assistance Grant Program for Historic Properties, administered by New York State Office of Parks, Recreation and Historic Preservation, to restore the Vale and Lookout Hill (another damaged area) to a healthy, native woodland habitat.