From I-91: I-91 to exit 13A which is US-5 north. Exit and go north (right) to Ashley Ave. (1st set of lights). Right on Ashley to first street on the right (this is to the right, when the road curves to the left - no street sign though). Turn right and then almost immedialty turn left on Capital Dr. Arena is on the left and at the end of Capital Dr.
From I-90 (Massachusetts Turnpike): Massachusetts Turnpike to exit 4 (towards W. Springfield). South on US-5 (Riverdale St.) about 1.25 miles to Ashley Ave. Left on Ashley Ave. to the first street on the right, just before street curves to the left (no street sign). Turn right, then almost immediately left onto Capital Dr. Arena is on the left at the end of Capital Dr.