Unknown Pond Tentsite is a backcountry campground in White Mountain National Forest accessible via hiking trails from Mill Brook Road or Berlin Fish Hatchery, featuring 6-8 designated tent sites, an outhouse, and reliable water from the pond or stream.

The remote location offers fly fishing opportunities (NH license required) and is popular for hiking and wildlife viewing, though hikers should be prepared for seasonal river crossings and snow on north-facing slopes into June.

First-come, first-served camping with no reservations; check White Mountain National Forest regulations before visiting.