One of my favorite trails in Southern NH is the Lincoln Trail on Mt. Kearsarge. I think some might consider it to be long and boring, but I find it has a lot to offer in subtle ways. It’s not as nearly as rocky as some of the trails in the White Mountains so it’s good for a casual stroll though the woods or a trail run. You also pass through a nice variety of different forests and if you go all the way to the top you have a great wide open summit with 360 degree views. The trail never seems to be used that much so peace and solitude is almost always assured. This is probably because there are a couple of other much easier routes to the summit and for a similar effort most people would go for the big kahunas up in the Whites. During the last 2 hikes I did on it I took some pics while everything had some good fall color.