A slow-moving train in Pennsylvania might have brought some runners' dreams of the Boston Marathon to a halt.

Lehigh Valley Health Network's Via Marathon was in full swing Sunday when a slow train crossed the race course near Allentown, stopping runners in their tracks.

Runner Charlie Young, from West Chester tells Lehigh Valley Live the race was his last chance to qualify for the 2017 Boston Marathon.

Twenty-two-year-old Young says he and over 100 others were held up for about 10 minutes as the train crossed. He says he missed his qualifying time by 8 minutes. [[393196991, C]]

Video and photos show some runners scrambling between the slow-moving cars.

Registration for the Boston Marathon started Monday, opening first to those who beat their qualifying time by 20 minutes.

Via issued says runner times will be addressed on a case-by-case basis due to the disruption.