There is a short (0.3 miles, or 0.6 roundtrip) trail located behind the Edythe Dyer Library in Hampden. Though short, the trail offers views of the Penobscot River.
I've been to the Edythe Dyer Library many times but today was the first time I've walked along this trail. I was pleasantly surprised by the views as the trail winds through tall trees with views from high above the Penobscot River. The trail itself is in excellent condition and well worn. Here is a map of my walk.