Section Hike Mt Katahdin VERY HARD!

We have a goal to section hike the entire Appalachian Trail, both North Bound (NoBo) and South Bound (SoBo), a total of 4,396.8 miles and finish by the time we are 75.  The very end of the trail in the North is Mt Katahdin in Maine.  We heard this was a very difficult hike so we did not want to save this one until the end.