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WELCOME TO SOUTHIE

Mass Underground is excited to announce the opening of our second location on East 1st & K Street in South Boston! Memberships are now available for purchase. Stay tuned for information regarding our Opening Day, coming this Spring 2025!

SOUTH BOSTON MEMBERSHIPS

INCLUDED AMENITIES

Every Mass Underground, Southie membership includes access to all of our cardio equipment, machines, free weights, saunas, ice baths, lockers, and facilities.

Your membership grants you access to our South Boston location Monday-Sunday, 365 days.

Mass Underground Bodybuilding Club        Created by Monica Canova Management, 2021

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