Usually, though, it rolls on a 1.75-mile track through the park at a child-friendly 10 or 12 mph, says train engineer Daniel Bocknek.
Little train ride in the park →
"We're doing as much as 26 runs a day," says Mr. Bocknek, a recent graduate of Lake Braddock High School. "You get a lot of kids here, but also teens. I asked my date to go to the prom with me on the train."