I have found that the directions to the Middlesex trail are not quite correct. There is no Worcester Rd, You turn right on Story Rd, not Worcester Rd. Just thought people should know, otherwise you may find yourself driving around for a while.
From waterburry trail
After Ben & Jerry Turner take the first right on Guptil rd (.9miles) turn right on Kneelands flat which turn into Ripley rd and the end of the road(4.7 miles), turn right on Sweet Rd.