From NPR News: North Korea Opens Marathon To All Runners,
Lately we've heard about the wonders of basketball diplomacy. Running could be the next thing for North Korea. The Pyongyang Marathon celebrates the birth of the fearless leader who founded the country. For nearly three decades it's been for elite athletes only. Now North Korea's marathon is open to everyone. The runners start at Kim Il-sung Stadium and they end there too, offering no chance to run for the border.
The first time I listened to it, I didn't feel anything wrong. So, the meaning is not the problem. However, once I noted it down sentence by sentence, I got stuck on the last sentence, the part offering no chance ... . It made me question myself "'Who' is offering?" The runners? The Stadium? The ending there? Or the whole [The runners start ... end there too]?
Pedantically speaking, is the last sentence in the passage grammatical?
Is the participial phrase (offering no chance ...) an apposition?
Or is it a "dangling participle"?