Jack pine (Pinus banksiana) is one of the rarest trees in the state, and is known primarily from a few scattered ridgetops in the White Mountains. It is a boreal species (generally found at high northern latitudes), and reaches the southern limit of its distribution in New Hampshire. On several ridgetops where this tree species is dominant, the woodland natural community it occurs in is classified as jack pine rocky ridge. The few examples in New Hampshire are found at mid to high elevations (1800-3900 ft.).
The Welch-Dickey Trail in the White Mountain National Forest passes through an example of this community, giving visitors an opportunity to see this unusual species up close.