Though the Bow River is not frozen over, I came across some nice formations along the river banks, where drift ice pile up ... here are some samples
http://farm9.staticflickr.com/8209/8...fb044bee_b.jpg
http://farm9.staticflickr.com/8350/8...ae4908ad_h.jpg
http://farm9.staticflickr.com/8482/8...35a924a1_b.jpg