From Rte 128. Take I-93 S about 2 mi to exit 35 [top left hand corner of map], follow signs 1 mi to Stone Zoo (N Border Rd becomes South St which becomes Pond St), go past Stone Zoo, take first left to stay on Pond St (straight ahead becomes Woodland Rd), go 0.3 mi to first right (stoplight) onto Fellsway East, go 0.4 mi to first major left onto Washington St, then about one mile to Oak Grove T (on your left). This is the Washington St side of T. Left onto Winter St gets you to entrance to main T pkg lot.
FromRte 60 & I-93. This is I-93 exit 32 [bottom left corner of map]. Take Rte 60 E about 1.2 mi. Turn L onto Highland Ave, go N 0.5 mi. Turn R onto Glenwood St, go E 0.6 mi. Turn L onto Washington St, go N 0.1 mi. Turn R into small T station lot or park on side street.
Note. For main T pkg lot, go straight onto Winter St instead of L onto Washington St [see map].
A trickier route is as follows:
FromRte 60 & I-93. This is I-93 exit 32 [bottom left corner of map]. Go about 2 mi E on Rte 60. Continue under the T underpass and past Stop & Shop (in shopping area on your R). Turn L onto Main St and go three blocks (very short). Turn L to stay on Main St, and continue 0.6 mi N to stoplight. Turn L onto Winter St. Turn R just ahead at the main Oak Grove T pkg lot or (a bit further) onto Washington St.
Warning. Be sure not to miss the left turn to stay on Main St. Straight ahead becomes Salem St [see map].