Location: Trailheads are located at Eagle Summit, 107 Mile on the Steese Highway, and at Twelvemile Summit at 85.5 Mile. Most people hike from Eagle Summit to Twelvemile Summit.
Description: A primitive trail that follows alpine ridges in the high country off the Steese Highway north of Fairbanks. The trail, which is entirely above treeline and offers panoramic views of the White Mountains and Crazy Mountains, is marked with wooden mileposts and rock cairns.
Most of the trail has at least an 8 percent grade and in some areas it’s more than 25 percent. There are two shelter cabins on the trail at Miles 10.1 and 17.8. Drinking water can be hard to find along the trail later in the summer when snow fields and small ponds dry up.
History: The trail was built in 1968-69 and opened on July 18, 1970. It was designated as a National Recreation Trail in 1971. The trail is named for Robert Pinnell, who was killed in an accident in 1952 while climbing nearby Porcupine Dome.
Source: Bureau of Land Management