The eastern portion of NH 112 is known as the Kancamagus Highway, running 32 miles (51 km) through the White Mountains from Lincoln to Conway.

The Kancamagus Highway stays open all winter, although it occasionally closes for short periods while crews clear heavy snows.

[3] Much of the western portion of NH 112 is also in the White Mountain National Forest, passing through Kinsman Notch with the Lost River tourist attraction.

The Kancamagus Highway opened in August 1959, after two dead-end stretches of road were linked,[5] creating a connection between US 3 in Lincoln and NH 16 in Conway.

[7] The highway is named after Kancamagus (pronounced "cain-kah-MAW-gus",[8] "Fearless One"[9]), third and final sagamore of the Penacook Confederacy of Native American tribes.

After English settlers arrested a number of Pennacook tribe members, he was forced to make the decision in 1691 to move north into upper New Hampshire and what is now Quebec, Canada.