rioVisit WebsiteGet Directions Details Amenities Details RIO is a lake front shopping dining and entertainment experience for the whole family located just off of I-270 in Gaithersburg, MD Hours See website for hours. Location9841 Washingtonian Blvd, Ste S1Gaithersburg, MD20878Get DirectionsContact Local Phone: 301-203-4187SocialFacebookTwitterInstagramYouTubeMapCapital Region Amenities Family-FriendlyFree ParkingPlaces NearbyAccommodationsSleep Inn-Rockville/Shady GroveLearn MoreAccommodationsCourtyard by Marriott-Gaithersburg Washingtonian CenterLearn MoreAccommodationsHilton Garden Inn-Rockville/GaithersburgLearn MoreAccommodationsCourtyard Rockville MarriottLearn MoreAccommodationsSpringHill Suites by Marriott-GaithersburgLearn MoreSee More For Capital Region