Experience towing with Eco in western mountains.

[Atlee]

My F150 with the Max Tow Pkg, and HDPP came with the built-in the dash brake controller.

Originally Posted by kirkdl9

^^Yeah all this is perfect advice^^
I tow a 27' Jayflight (5-6k lbs) with a 2015 F150 3.5 Ecoboost but have only done so in the Appalachian range on pretty steep slopes but NO ice. It tows very very well so I think you'll do just fine. Do you have a trailer brake control? It is not only helpful but vitally important when traveling in the mountains. I use a combination of the engine and brakes to safely navigate the slopes. Pay attention and don't let other drivers impatience make you uncomfortable.
This is great advice: mmwhit " On some very steep down grades I manually shift down before the descent. On the descent I will press fairly heavily on the brake pedal for short periods of time when needed (when RPMs race uncomfortably higher or speed is uncomfortably faster) and then let off the brake pedal as soon as I can and this keeps RMPs lower and my speed at a safe level."
I would NOT use cruise control in the mountains! It can not foresee what's coming up and therefore will cause more wear and tear on your truck. Bad idea. I've also never heard of an F150 applying brakes in cruise control setting.
Your truck will do fine and all you have to do is be attentive and travel at a speed you are comfortable with. Have fun!