There is a light rail train from Denver International Airport (DIA) to downtown Denver with public transportation options to the location near the Colorado Capitol building. http://www.rtd-denver.com/lightrail.shtml
There is also bus service to near the facility and a free shuttle that runs throughout the length of Downtown Denver on 16th Street. http://www.rtd-denver.com/bus.shtml
There are taxis from the Airport as well as Uber and Lyft. https://www.flydenver.com/taxi, https://www.uber.com/global/en/cities/denver/, https://www.lyft.com/rider/cities/denver-co
Car rentals are also available at DIA. https://www.flydenver.com/parking_transit/car-rentals