Techniques and Equipment for Wilderness Travel with Stock
Plastic snow fence can be used to contain stock. It is light weight, easy to pack, and is available in a variety of colors, including green and black. Some people use a strand of electric fence at the top of the snow fence to make sure that stock do not escape from the enclosure.

Horses in snow fence enclosure.
Pole corrals are prohibited in many wildernesses because they concentrate use into a small area, which results in trampled vegetation and compacted soil. Where pole corrals are allowed, cutting green trees to make poles is prohibited. When pole-size downfall is abundant and pole corrals are authorized, poles secured to trees should be tied with rope rather than secured with wire or nails. Nails should never be driven into green trees. Wood shims or gunny sacks should be placed between the pole and the tree to protect the bark. Some intermediate posts cut from downfall may be used to strengthen the corral when trees are far apart. Contact the local land manager to find out how long a pole corral can be left in place before it must be moved. Pole corrals should be dismantled after use.

A pole corral secured with rope, wood shims, and gunny sacks.
Rope corrals are easier to erect and remove than pole corrals and they do not require poles where standing trees are available. But, rope corrals may not be as secure as pole corrals and a lot of rope must be packed in. One method uses two parallel ropes tied with frequent loops or bowlines so cross ropes can be threaded through to make a more secure enclosure. Feed sacks or wood shims should be used to protect the tree from the rope.
Rope corral.