Taylor Mill (Ballard State Forest) - The Taylor Mill is located in the Ballard State Forest on Island Pond Road in Derry, New Hampshire. Directions to the mill from I-93: Exit 4 East on Rte. 102 to Rte. 28 By-Pass South. At 2nd set of lights, take left on to Island Pond Road. The mill is 3.7 miles on the left. Click on the image on the right for a detailed location map.