The US Geological Survey produces topographic maps for the US. This mapper lets you zoom in on your property (or anywhere else in the country), pick the topo map you want, and then download it for free. The latest topo maps also include an aerial photograph.
If you really want to learn how to interpret your woods’ history, consider this Amazon.com link to purchase Tom Wessels’ book about how to be a woodlot detective. Drawings and short case studies teach you how to find clues and solve mysteries of past human activity, natural disasters, wildlife, and more.
Want a personalized map for your property? For a fee, the Catskill Forest Association will make you a property map that features topographic lines and aerial photos as well as property boundaries, trails, and unique property features.
You can see a lot from your trails, but sometimes the best places are stumbled upon by accident. Get off the beaten path and explore your woodlot with the help of a map, compass, GPS unit, or smart phone.