Yak

The Yak (Bos grunniens or Bos mutus) has been domesticated in its natural range for centuries. It serves as a beast of burden, is great for milk and its long thick wool is great for clothing, tent making, or any desirable use of woven material.
They range from the Himalayan region of south central Asia, the  Tibetan Plateau, and north to Mongolia and Russia.
They form herds of 10 - 30 minimally, but can be as large as several hundred. The wild yak avoids humans.

Zoos where they can be seen are:

Alaska region
Alaska Zoo Anchorage, Alaska 

Pacific region
Greater Vancouver Zoo Aldergrove B.C., Canada
Olympic Game Farm Sequim, Washington
Wildlife Safari Winston, Oregon

Mountain region
Tautphaus Park Zoo  Idaho Falls, Idaho

Central region
Wild Animal Safari  Stratford, Missouri
Promised land Zoo  Eagle Rock, Missouri
Wild Wilderness Drive Through Safari  Gentry, Arkansas

Eastern region 
Potter Park Zoo Lansing, Michigan
Living Treasures Wild Animal Park  New Castle, Pennsylvania
Southwick's Zoo  Mendon, Massachusetts
Space Farms Zoo  Sussex, New Jersey
Virginia Safari Park  Natural Bridge, Virginia
Luray Zoo  Luray, Virginia
North Georgia Zoo   Cleveland, Georgia
Wild Animal Safari  Pine Mountain, Georgia