This cache is located just off of Lynx trail not far south of Beaver pond. Here is a trail map of the entire park. It is quite handy to have so you don't lose your way in the vast wilderness of Bear Brook. https://www.nhstateparks.org/uploads/pdf/Bear-Brook_Trail-Map.pdf
The cache is within 100 feet or so of the trail so don't go on any unnecessary bushwhacking adventures. If there's more than a foot of snow then it could make finding it much more difficult but if there's less than a foot It should be doable. I come here every summer for a weeklong camp with some friends and family and finally got to placing a cache here this year. Have fun!