Goliath

At the highest mountain peaks-far above the slopes where trees grow and where the air is thin and the frigid winds howl-dwell the reclusive goliaths. Few folk can claim to have seen a goliath, and fewer still can claim friendship with them. Goliaths wander a bleak realm of rock, wind, and cold. Their bodies look as if they are carved from mountain stone and give them great physical power. Their spirits take after the wandering wind, making them nomads who wander from peak to peak. Their hearts are infused with the cold regard of their frigid realm, leaving each goliath with the responsibility to earn a place in the tribe or die trying.  
  Ability Score Increase. Your Strength score increases by 2, and your Constitution score increases by 1.
Size. Goliaths are between 7 and 8 feet tall and weigh between 280 and 340 pounds. Your size is Medium.
Speed. Your base walking speed is 30 feet.
Age. Goliaths have lifespans comparable to humans. They enter adulthood in their late teens and usually live less than a century.   Natural Athlete. You have proficiency in the Athletics skill.
Stone's Endurance. You can focus yourself to occasionally shrug off injury. When you take damage, you can use your reaction to roll a d12. Add your Constitution modifier to the number rolled, and reduce the damage by that total. After you use this trait, you can’t use it again until you finish a short or long rest.
Powerful Build. You count as one size larger when determining your carrying capacity and the weight you can push, drag, or lift.
Mountain Born. You have resistance to cold damage. You’re also acclimated to high altitude, including elevations above 20,000 feet.
Languages. You can speak, read, and write Common and Giant.