Civic Center got an overnight makeover, as a chain-link fence was erected that encircles all but the western portion of the park.
An employee for the event management company on site referred all questions to Taste of Colorado, which has a permit to the park through the weekend.
The fence prohibits entrance to the park grounds.
Civic Center was the flashpoint for Monday night’s clash between a protest group and police that spilled over into a tense standoff in a block-long area of 15th Street.
The decision to erect the fence early Wednesday morning was unrelated to the disturbance of concerns that another protest might erupt, said John Harrison, spokesman for the Denver Joint Information Center.
The popular Taste of Colorado event, in its 25th year, begins Friday and runs through the Labor Day weekend.
It annually draws 500,000 visitors.