Seen from the parking area. Head up this formation. It's not hard to keep this at Class 3, but it's also not hard to suddenly find yourself on Class 5 terrain.
This is not the summit. The real Ant Hill appears after you reach the crest of this formation. I found a cairn near its top. Maybe some labor up these steep slopes, see the steep south buttress of Ant Hill, and call it a day at that!
Zion National Park, UT-- March 2013