Wyoming Trading Post
Horsemanship

Wyoming Horse Breeds: What Actually Works in Working Mountain Country

Quarter horses, Mustangs, mules, and gaited stock. An honest assessment of what each is good for in Wyoming's working mountain country, and why.

By Wyoming Trading Post Editors Updated October 13, 2026
A band of wild horses strung out across sagebrush flats in the McCullough Peaks Herd Management Area, Wyoming, with a long line of snow-covered mountains on the horizon.
Wild horses in the McCullough Peaks Herd Management Area east of Cody. Hard feet, an efficient metabolism and weather tolerance are what this country selects for, and they are the same three things mountain working stock needs. , Photo: Bureau of Land Management, via Wikimedia Commons. Public domain.

Wyoming horsemen have opinions about horses, and most of them are correct. The state has some of the most demanding horse country in the lower forty-eight: high altitude, hard rock trails, deep snow in winter, the cold dry summer that ages tack and stock alike. Horses that are merely pretty or merely bloodlined do not last here. The breeds that work are the ones selected by the work itself.

This is a working assessment of the breeds that suit Wyoming conditions, and why. It is not a comprehensive breed guide. It is the short list of breeds that hold up in Wyoming conditions and do useful work in them. Many outfits do not bet the barn on one breed; they run a mix, Quarter Horses for cow work, Mustangs or mules for the backcountry, matching the animal to the job rather than the other way around.

The American Quarter Horse

The default Wyoming working horse. The American Quarter Horse Association (AQHA) describes itself as the world’s largest equine breed registry, and the breed dominates Western working culture for well-earned reasons. Heavy hindquarters built for short bursts of speed and quick stops (the original cattle-cutting and quarter-mile racing builds), calm dispositions selected over generations of ranch breeding, and a willingness to work.

Where they shine: cow work, ranch chores, arena disciplines (cutting, reining, roping, barrel racing), and trail riding within reasonable distances. The Quarter Horse is the right answer for any Wyoming working operation that runs cattle.

Where they don’t: sustained long-distance backcountry work. Quarter Horses tend to be heavier-bodied than is ideal for multi-day pack trips at altitude, and a bigger horse needs more feed. For the four-day Bighorn pack trips and longer wilderness work, smaller stock is generally preferred.

The Mustang

The American Mustang, descended from horses brought to North America by the Spanish in the 1500s and crossed with later European stock that escaped or was released onto the open range, is one of the most underappreciated working breeds in the country. Wyoming holds significant Mustang populations on Bureau of Land Management ranges in the Red Desert, the Pryor Mountains (along the Montana border), and the McCullough Peaks east of Cody.

The qualities that generations on the open range selected for are exactly the qualities that mountain working stock needs.

Four wild horses standing close together in tall grass on Bureau of Land Management range in Wyoming, a pinto and a bay in front with two more behind.
Wild horses on Bureau of Land Management range in Wyoming. The BLM manages Mustang populations across the Red Desert, the Pryor Mountains, and the McCullough Peaks east of Cody. Untrained animals adopted through the BLM's Adoption Incentive Program carry a $125 minimum fee, and qualified adopters can receive up to $1,000 after they take title. Photo: Bureau of Land Management, via Wikimedia Commons. Public domain.

Hard feet. Mustangs are known for hard, durable hooves, and many work barefoot. This is enormous for backcountry work, where a thrown shoe four days into a trip is a problem and a thrown shoe with no easy boot is a trip-ender.

Efficient metabolism. Mustangs hold weight on poor forage. A pack horse that maintains condition on native grass alone is worth its weight in supplemental feed budget over a season.

Weather tolerance. Thick winter coats, calm in extreme cold, comfortable in conditions that stress thinner-bodied breeds.

Sound minds. Well-started Mustangs often have grounded dispositions. They are alert (necessary for survival in mountain lion and grizzly country) but not flighty.

The trade-offs: Mustangs are typically smaller than ranch-bred Quarter Horses, which some riders find limiting for size matching. They take longer to start than ranch-bred horses, and need an experienced trainer for the first months. Personalities are stronger than typical ranch stock, which is mostly an asset but requires confident handling.

Adoption: untrained animals adopted through the BLM’s Adoption Incentive Program carry a $125 minimum fee, and qualified adopters can receive up to $1,000 within 60 days of taking title. The BLM keeps title for at least 12 months, and inspects the animal in that time, before ownership is officially yours. Budget separately for professional starting. That said, adopting only makes sense if you already have experience with green horses or the budget to pay someone who does; a wild-caught Mustang is not a project for a first-time owner.

Where to find them: buyers who want the Mustang without the adoption gamble should look at the Wyoming Honor Farm near Riverton, a Wyoming Department of Corrections facility that gentles BLM wild horses and burros. It holds two competitive-bid adoptions a year. At the September 2024 event all 46 animals found homes; riding horses averaged $2,147 and the top bid was $5,000.

Mules

Many backcountry packers will tell you the mule is the best pack animal there is. The cross of a male donkey (jack) and a female horse (mare) produces an animal that combines the donkey’s hardiness, sure-footedness, and intelligence with the horse’s size and strength.

Where they shine: pack work above all else. Packers favor mules for their stamina, their sure-footedness in steep switchback terrain, and their self-preservation instinct (a mule will often refuse a dangerous trail; a horse may try it). For serious horseback camping trips, a mule pack string is the classic choice.

Where they don’t: mules are not riding horses for most riders. The gait is different (less smooth than a horse, more trot-heavy), they require different handling than horses, and mounting can be different. Some riders love mule riding; most stay with horses for the saddle work and use mules for packing.

The gaited breeds (Tennessee Walking Horse, Missouri Foxtrotter, Rocky Mountain)

For long-distance trail riders and outfitters running multi-day client trips, gaited horses have a real advantage. The smooth lateral gaits (running walk, foxtrot, single-foot) eliminate the trotting bounce that exhausts riders over a long day in the saddle. Eight-hour days that would beat up a Quarter Horse rider are comfortable on a Tennessee Walker or Missouri Foxtrotter.

Where they shine: long-distance trail riding, multi-day pack trips with green riders, dude-ranch use, endurance riding.

Where they don’t: cow work (the gait does not suit cattle). Some gaited horses also struggle in steep switchback terrain compared to Quarter Horse-Mustang stock.

Wyoming context: some outfitters and guest ranches keep gaited horses for multi-day client trips. If you are booking a multi-day outfitted trip and you are not an experienced rider, ask whether gaited stock is available.

Crosses and grade horses

Plenty of Wyoming working horses are not registered. Common types include the Quarter Horse-Mustang cross, the Quarter Horse-Thoroughbred (the “appendix” Quarter Horse), and working-line crossbreds of unrecorded ancestry. These “grade” horses are often fine working animals, and buyers who know what they are looking at can find good ones.

Quarter Horse-Mustang cross: combines Quarter Horse training and disposition with Mustang hardiness and feet. Among the best working backcountry horses available.

Quarter Horse-Thoroughbred: more athleticism, more height, faster but more nervous than pure Quarter Horse. Common in arena disciplines, less common in working ranches.

Quarter Horse-Draft: larger, calmer, used for heavy work and as packing horses in some operations.

The right approach for buyers without specialized needs: ignore breed lineage and evaluate the individual horse. A grade horse with a clean conformation, calm mind, sound feet, and demonstrated working ability is worth more than a registered horse with paperwork and problems.

What about Thoroughbreds, Arabians, Warmbloods?

Honestly assessed:

Thoroughbreds: too thin-skinned for most Wyoming work, and generally bred for short bursts of speed rather than sustained work at altitude. Some excellent individuals exist, especially older retired racehorses retrained for trails, but the breed is not a Wyoming default for good reason.

Arabians: excellent endurance breed and surprisingly well-suited to hot dry conditions; less common in Wyoming but Arabian-Quarter Horse crosses appear in some endurance and trail strings. Pure Arabians are uncommon in Wyoming working operations.

Warmbloods: dressage and jumping breeds, much too refined for Wyoming working conditions. Not a serious option for ranch or pack work.

Friesians, Andalusians, other “exotic” breeds: beautiful in pictures, mostly impractical for Wyoming working use. Specialized buyers exist; few working operations run them.

What to look for buying a Wyoming working horse

After breed considerations:

  1. Sound feet. Pick up each foot. Look for clean frog, balanced wear, no thrush, well-shaped hoof wall. A horse with chronic foot problems is not a Wyoming horse.
  2. Balanced conformation. Even leg lengths, square stance, no obvious skeletal asymmetry. Conformation problems become soundness problems under work.
  3. Calm mind in unfamiliar settings. Take the horse off the property if possible. A horse that is calm at home but explodes off-property is not a working horse.
  4. Proven mountain experience. Specifically ask about steep terrain, river crossings, blowdown, switchbacks. A flatland horse can take a long time to become a mountain horse.
  5. Health certificate and Coggins test. Wyoming requires a certificate of veterinary inspection and a negative Coggins (equine infectious anemia) test from within the previous 12 months for horses brought into the state; other states set their own rules. Good practice within a state, too.
  6. Vet check. Always. Independent vet, not the seller’s vet. Money well spent.

Resources

  • American Quarter Horse Association for registry information and breed standards.
  • Bureau of Land Management Wild Horse and Burro Program for Mustang adoption information.
  • Wyoming Honor Farm near Riverton for gentled Mustangs, at its twice-yearly adoptions.
  • Local working ranches are the best source for buying working stock; ask outfitters and ranchers directly when you are in Wyoming towns like Sheridan or Cody.
  • Working tack: for pack trips, a neoprene cinch is easy to hose clean after wet, muddy days; a 40-ft cotton lash rope is the standard for diamond hitching a load; Kinco 1927KW gloves are a lined pigskin work glove that holds up to cold-weather stock handling.

For visitors interested in actually riding while in Wyoming, the easiest path is a licensed outfitter trip on stock the outfitter has selected for the conditions. For buyers serious about owning a Wyoming working horse, the right path is patience: spend a year getting to know the breed and the buying community before purchasing, work with a vet you trust, and budget for training. The reward is a working partner for many years of mountain work.

A loose band of ranch horses picking their way across snow-patched sagebrush at the Midland Ranch in Sweetwater County, Wyoming, under a hard blue winter sky.
Horses out on snow-patched sage at the Midland Ranch in Sweetwater County, below the Wind River Range. Stock wintered like this, rather than blanketed in a barn, is what people mean by weather tolerance. The Pryor Mountain and McCullough Peaks herds north and east of Cody still run wild in the same conditions, and they still feed into the BLM adoption program. Photo by Carol M. Highsmith, Library of Congress (LCCN 2017686116). Public domain.
Two heavy-muscled sorrel work horses standing at a steel hay feeder in a bare winter corral at Big Creek Ranch, Carbon County, Wyoming, with snow-covered mountains behind.
Work horses at the Big Creek cattle ranch in Carbon County. Look at the hindquarter and the short cannon on the near horse: that is the build the American Quarter Horse is kept for, short bursts of speed, agility on cattle, and the temperament to stand all day in a pen full of stock. Photo by Carol M. Highsmith, Library of Congress (LCCN 2017687578). Public domain.

Further reading

  • Packin’ In on Mules and Horses by Smoke Elser & Bill Brown (Mountain Press, 1980). A long-standing packer’s reference.
  • Western Horseman magazine, breed and ranch-horse coverage in nearly every issue.
  • Bureau of Land Management Wild Horse and Burro Program annual reports.
  • Pryor Mountain Wild Mustang Center publications on the regional Mustang population.

Sources

  1. American Quarter Horse Association, About AQHA (describes itself as the world's largest equine breed registry)
  2. Bureau of Land Management Wild Horse and Burro Program (Wyoming)
  3. Wyoming Mustang heritage and the Pryor Mountain herd
  4. BLM, Adoption Incentive Program changes (Jan 26, 2022: $125 minimum fee, up to $1,000 after title, title no sooner than 12 months)
  5. BLM, Wyoming Honor Farm places 46 gentled animals (Sept 18, 2024: riding horses averaged $2,147, top bid $5,000)
  6. Wyoming Livestock Board, Chapter 8 Import Rules (October 2025), Section 12: equine EIA test within 12 months
  7. Smoke Elser & Bill Brown, Packin' In on Mules and Horses (Mountain Press, 1980)