This trail is convenient to Rt 112 ("the Kank") just inside the National Forest from Lincoln, NH. The main trail is a former logging railway along the scenic East Branch of the Pemi River, so it is wide and gently inclined. Some of the old ties and rails are still visible. Two rewarding destinations are Franconia Falls and Black Pond, both a mile or less off this trail at about the 2-1/2 mile point.
I just climbed up to Black Pond, an alpine pond of great beauty. The trail follows its outlet stream up a moderate incline. On April 4th, 2013 there were still about 1-2 ft of snow, hard-packed on the trail and easy to climb.
Other trails, such as the Osseo, branch off the main trail and lead to more challenging terrain.
If you are visiting at a time when snow and ice may be present (in my case the first week of April) bring ice grippers for your boots and a walking stick. The wet icy patches were very slick. Oh, and bring your camera!