Hey Trihiker -
I End-to-End hiked the LT last fall. 27 days… truly one of the greatest experiences of my life. You are going to have a great time.
When I was preparing for my hike - I too had a lot of questions about the terrain. There is a lot of hype surrounding Northern Vermont and how difficult it can be to get through. The truth is - it IS hard, but no where near impossible. If you are willing to put in long days (8 or more hours of hiking) you can def. hike 15+ mile days - even in the Camel’s Hump/Mansfield Area.
That being said - I would say that I noticed a major increase in terrain difficulty at Brandon Gap. Climbing up to the Horrid Cliffs wasn’t that fun, haha. Freebird is right - the terrain before Camel’s Hump is difficult as well - specifically from the Montclair Glen Lodge north to the Summit.
Other difficult stretches that come to mind: Mt. Mansfield from the Puffer Shelter all the way to the Forhead near the summit.
The hike up to Bolton Mt. is more LONG than it is HARD - pretty much because you’re coming from one of the lowest points on the trail (Jonesville) to an elevation just under 4000.
Another long hike - coming out of Smuggler’s Notch all the way up to Madonna Peak. Seemed to take forever. A good idea here would be to crash at the Warming Hut at the summit instead of pushing on. It’s not in the LT Guide Book - but it’s there… and it’s open. One of the best views on the trail… Mt. Mansfield, Lake Champlain, and the entire Adirondack Mountain Range. Unreal.
Hope any/all of this helps.
Enjoy the trip!
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