Concord-Carlisle High School 500 Walden Street, Concord, MA. Take Rte 2 to Rte 126. Turn left on Rte 126 (Walden St.). The HS is on your left at the bottom of the hill (about 1/4 mile from Rte 2). Link to Google Maps directions.
It's harder to get there by public transportation but here it is: Several buses (110, 114, 116, 119, 411) stop on Broadway which is a short walk to the school--it's down Mountain Ave but you can get off near Park Ave, Cushman, Central or Fernwood too. The closest T stops are Revere Beach and Wonderland on the blue line. The Revere Beach stop is easier--you then take the 117 bus to Maverick Station which stops at Beach Street & School Street, and then you just walk down School Street.
NOTE: Parking is extremely limited at Teddy Ebersol's Red Sox Fields. Please use public transportation. If you must drive, your best option is to find metered park along the side streets near 1st/2nd street in Cambridge and walk across the Longfellow bridge on the right side. At the end of the bridge, exit to the right, then walk along with river on your left. Fields are approximately 50 yards from footbridge.
By MBTA (Public Transportation):
MBTA Green Line to Science Park station. Cross street and walk to the left along Storrow Drive with the river to your right. Fields are on right. MBTA Red Line to MGH/Charles Street station. Cross footbridge over Storrow Drive toward river. At end of bridge, walk with river on your left. Fields are approximately 50 yards from footbridge.
From 93 North or South:
Take exit #31 Mystic Valley Parkway.
Follow Route 16 West all the way until you reach Dilboy Field on your right. You will pass through three intersections and then follow a small rotary. The field will then be on your right.
From Route 2:
Follow Route 2 East to the Alewife Exit.
At the end of the ramp follow to the left/ Route 16 East. Follow Route 16 East for two sets of lights, then you will reach a rotary-stay on route 16. Dilboy field will be on your left.