Around this same time frame, oil was discovered in the Coalpits Wash area. An operation to drill for oil was established. In 1919 the national monument was expanded to phplude Coalpits Wash and the name was changed to Zion National Park. The remains of the oil operation are still visible in the canyon. Again the wash narrows and steepens as it nears the end of the canyon.
More waterfalls appear with varied and interesting ice formations.
Icicles form on the Maiden Hair ferns that hang from the shelves, giving the appearance of some icy, backcountry chandelier. As we reach the end of the canyon, we realize that the Winter Solstice was just a week ago and we will be walking in the dark unless we move quickly. We return the same way we hiked in. We look at each other and realize how lucky we were to be in the right place at the right time to see the frozen formations. We push hard to get back to the trailhead before nightfall.