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BIO has a limited block of rooms at the Marriott Marquis Washington DC. 

Marriott Marquis
901 Massachusetts Avenue NW
Washington, DC 20001
202-824-9200

Book Rooms Here

Please note that none of the BIO Fly In events take place at the hotel, so booking rooms at other hotels will not disadvantage you as long as you are near downtown or Capitol Hill. Please contact Brian Stoker with any questions at bstoker@bio.org or 2023129273.