Horse Hill Nature Preserve is a 10 mile hiking trail in Merrimack, New Hampshire.
Take Exit 11 off of Everett Turnpike in Merrimack, Take a right at the burger <br /><br />king on Amherst Rd. Follow for about 3 miles. Sign and lot for the preserve is <br /><br />on the left hand side.
http://www.tripleblaze.com/trail.php?c=3&i=7922