The wind drag on that large-ish flag must be considerable!
Then, about 10 years ago, Wauben completed a 30-mile run in Miami, this time wearing a Santa hat with a little American flag attached, and “people absolutely loved it," he said.
In the years since, Wauben has become known as "The Running Man" of Florida, often seen carrying at least one flag on his inspirational runs.
If that was an organized running event, I'm going to guess that "30-mile run" was actually a 50K, 31.1 miles, which is a somewhat common distance in the ultra-marathon world.