It is cold in the mornings at Bryce Canyon. In late mid-September it was literally freezing, since the park is at 8000 ft. (A little unexpected after the warmth of Canyonlands and Monument Valley...) In fact, temperature at Bryce drops below freezing during the night more than half the days of the year. This daily freeze/thaw cycle is largely what has created the spectacular hoodoos you see here glowing in the morning sun at Sunrise Point. Hoodoos form from a hard capstone rock protecting the column from weathering from the top, but the freezing chips pieces off the sides.