Where do timber rattlesnakes live?

Eastern Texas through about the bottom half of Wisconsin and from Northern Florida up through the bottom half of New Hampshire. They're found in deciduous forests in leaf litter, under logs, in rock crevices, etc. It's notable that there are differences in venom throughout its range, with southern populations having much more neurotoxic venom (called canebrake toxin after the Canebrake region of Alabama) while more northern populations have hemorrhagic and proteolytic venom.