Deep hole next to main trail at lower end of Hotcake Slough This is a section of the Iron Dog Snowmachine Race Trail. It appears well traveled and safe. But, notice the hole to the right. The water here was over six feet deep. Process Observed: Open Water (Hidden) Date Process Observed: Saturday, March 31, 2012 Galleries: Main part of the Tanana River at lower end of Hotcake Slough Gallery