The cache title tells it all! A film canister, in the wood, in the woods. Just east of the rail trail, 25 - 35 feet.
My wife and I love this rail trail, and spent many, many hours cycling from Yonkers to Danbury, and now continuing north on the Mayberry trail to Pughkeepsie and New Paltz.
Bring your own pen, and please gently close the container.