Sunday, September 25th at 10 a.m. Forest Ecology Walk: cary institute/Hudson River Valley Ramble. Connect with nature while learning about how past land use practices shaped forests in the Hudson Valley. The moderate 2-mile walk encompasses habitats ranging from young forests and fallow fields to streams and wetlands. Led by Forest Ecologist Dr. Charles Canham, this event will meet at the Cary Institute (Gifford House) parking area, located at 2917 Sharon Tpk. (Rte. 44) in Millbrook, N.Y. Reservations suggested. Call (845) 677-7600 x121.