White Mountain National Forest · New Hampshire, Maine

Unknown Pond

5.4 mi of trail, end to end · about 1,400 ft of climbing · 1,657 ft–3,185 ft · native material surface · trail No. 34044 · trail class 3 · typical grade 10-12% · tread 18-24 inches wide · hiking, bike

Backcountry camps

1,744 ft 1,657 ft · 5.2 mi high 3,183 ft

Along the way Unknown Pond Tentsite

Trailheads Unknown Pond North Trailhead 1,741 ft Drive there · Unknown Pond South Trailhead 1,677 ft Drive there

Unknown Pond North Trailhead the Forest Service's write-up

This trail crosses to the Kilkenny Ridge Trail and is a shorter, but steeper route to scenic Unknown Pond than from the Southern Trailhead. There are designated tent sites and an outhouse at Unknown Pond, but not at the trailhead. Mill Brook Road is gated closed in the winter.

This trailhead on fs.usda.gov

Unknown Pond South Trailhead the Forest Service's write-up

It is 3.3 miles from the trailhead to the Unknown Pond Tent site and the serene waters of Unknown Pond. There are no amenities at the trailhead, but an outhouse and tent sites can be found at Unknown Pond. The Fish Hatchery Gate is closed from 4 pm-8 am, so hikers will not be able to drive into or out from the Trailhead during those times. FMI (603) 449-3412

This trailhead on fs.usda.gov

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About this trail's facts

The lines are the US Forest Service's National Forest System trails layer (public domain), read 2026-10-16 and simplified for the map; the length is the line's, end to end, and the class, surface, grade and tread width are the forest's own entries where it publishes them - a forest that publishes the centreline alone has none. The trailheads and the points along the way are the Service's recreation points, and the write-ups its own recarea text, unedited. Heights come from USGS 3DEP through Terrain Tiles on AWS (Mapzen/Tilezen), read along each line and rounded; a short trail on steep ground can be off by a few tens of feet. Closures change: check the forest's own site before you go.