The Pumpelly Trail at Monadnock State Park in Dublin, New Hampshire is the longest route to the summit of Mt Monadnock at 8 miles out-and-back. It's also considered to be an easier hike up because the elevation gain is stretched out compared to some of the other routes to the summit.
The trail starts off easing through beautiful pines with old stone walls to the sides of the trail. After roughly 1 mile, the trail truly begins its upward climb with the first real ridge being as step as the southern routes. After the first big ridge, next is a smaller ridge that climbs upward in spurts with steep ups and downs over rock faces, but each peak provides views. The last leg of the trail eases up to the summit allowing hikers to choose their own path.
Note: This trail is well worn but not very popular and there are no trail markers, the closer you get to the summit there are rock piles (cairns) you can follow - these seem to be the only real trail markers. Also note that this recording is 8 miles and the trail head sign says 4.5 miles to the summit.
Pets/dogs: are not permitted in Monadnock State Park.