According to Bruce Heald, rattlesnakes were last seen at late as 1946.
When I hike on the island, I do take care and pay attention in the areas where a rattlesnake might be found. Just because no one has seen one for so many years, doesn't mean they are completely gone. I also know that snakes swim. That is how so many Caribbean Islands got them. If you scroll down the page on the NH Timber Rattlesnake website, to
Where you may find A Timber Rattlesnake - we have the perfect environment for them.
Rattlesnake skins and artifacts from the island and surrounding area can be seen in the
Libby Museum, located on Route 109 in Wolfeboro.