Darn steep to be sure! However vertical faces typically result in the topo lines merging together to the point they cannot be distinguished and become one brown blur.
Your parent comment's map looks like 500+ feet of vertical, so I'm fairly impressed by the 5 year old :)
If it's a standard USGS topo map, his track should be about 150 meters or 500 feet, putting them right at 45 degrees (shallower at the start, steeper at the end)
