Merrimack Valley Juniors/Chelmsford High School:

Take Route 128/95 to Route 3 North. Take exit 32 (Route 4) at Drum Hill Rotary. At top of ramp, go 1/2 way around the rotary, crossing over route 3.
Take Westford Road on the right. Take first right onto Graniteville Road. Take next right onto Richardson road.
Take the 2nd driveway and follow it to the back of the school to gym.