Deep in the most inhospitable mountains dwarven monks commune with their mountain homes. Built high on freezing peaks these monasteries train monks to endure pain, stop blades with their bare hands, and call on the very strength of the mountains. They strengthen their mind and bodies with grueling training; punching rocks, meditating in blizzards, riding landslides, and other such acts. It is rumored few besides dwarves can even survive the first week of training. 

Iron Skin

Starting when you take this tradition at level 3 you can use your Ki to reinforce your body. Once per round when you take damage you can reduce that damage by an amount equal to your unarmed attack damage.  (example 1dX +Dex or Str)

In addition as a reaction you can spend 1 ki to gain advantage on strength checks or constitution saves until the end of your next turn. 

Mountain Stance

Starting at level 6 your ki flows through the stone and earth below your feet. You gain the following benefits

 As long as your feet are on the ground you cannot be knocked prone and are immune to abilities that would knock you prone.

 As long as your feet are on the ground you can, as a bonus action, grant yourself tremorsense 60ft for a number of rounds equal to your monk level. Once you have used this ability you cannot use it again until you have finished a short rest.  

 As long as your feet are on the ground as a reaction you can spend 1 Ki to gain advantage on strength saves. 

Avalanche Strike

Starting at 11 level you can unleash the fury of the mountain into your strikes.

When you are hit with a melee attack in combat, as a reaction you can spend 1 ki to make two unarmed strikes against your attacker. If you spend additional ki you gain one additional attack per point of ki spent in  this way.  You may use this ability a number times equal to your constitution modifier (minimum 1) and regain the use of this during a long rest.

Heart of the Mountain

At level 17  your pulse slows and your flesh becomes as durable as stone.  Your constitution score increases by 4 and your maximum Con scores is now 24. In addition you gain resistance to thunder damage and immunity to cold damage.