Because I had planned out the hike, the distance, and the time it would take us, I was not worried that we got started a bit late at around 11am since we had plenty of time to finish this hike and return well before dark. However, since we were going the wrong direction, all of the calculations were off.
We reached the top of Mount Leconte around 6pm, prayed 'asr, and began heading back down. When we reached a small stream (the only source of water on the trail), it was already getting dark. This was only about one quarter of the way down. We made wudu' the stream and then hiked on a little ways until we found a flat place to pray maghrib.
By this time it was quite dark. We were in the middle of the mountains of Tennessee with only two flashlights and no signs of life around. The stars were bright and abundant. Our teacher began to lead us in maghrib. After Surah al-Fatihah, he read:
Allah is the Light of the heavens and the earth (24:35).