"The annual arts festival in the Black Rock Desert attracts 70,000 to the city on a dry lake bed two hours north of Reno".
As fellow festival-goers watched on, Aaron Joel Mitchell broke through a safety perimeter on Saturday night (local time) and ran into the flames, organisers said in a statement.
The box reportedly arrived at Google's Sunnyvale offices on August 21 and was then driven two days to Black Rock City, Nevada, where Burning Man took place.
Black Rock City fire crews rescued the man, and he was treated at the scene and airlifted to a burn center, the festival said in a statement posted to its website. If you're not familiar with Burning Man, it's an annual event that started in 1986 and culminates with the burning of a large wooden statue.
Images show a firefighter trying to catch the man before he ran into the burning 15m-tall effigy, called The Man.
Allen said doctors confirmed Mitchell wasn't under the influence of alcohol but that a toxicology report is pending as part of the investigation. It is known that attendees of the festival have tried to run into the flames as a symbol of rebirth.
In 2014, a man in Utah died by jumping into a huge ceremonial bonfire in an event that was similar to Burning Man.
The blaze - known as the Tohakum 2 Fire - has engulfed over 30,000 acres of land.
A man attending Burning Man jumped into the festival's flaming centerpiece before horrified witnesses as firefighters tried to stop him.
Burning Man ends Monday.