I must admit that I imagined being a marathon runner in the olympics going through this tunnel and onto the bridge since this was the end of the trail. But of course, I was really only a third of the way since it generally takes twice as long going up. I can't imagine the mules going through here, but they do on a daily basis. I wonder if the riders have to dismount? I'd read that this bridge sways a bit, but it seemed very firm to me.