The American Quarter Halter Horse (Quarter Halter Horse, also known as an American Quarter Show Horse) is a sub-type of the American Quarter Horse, which was developed to serve as a halter horse rather than a stock-working horse. It is known for its unique conformation.

'Halter' Quarter Horses vs. 'working' Quarter Horses:
Halter is a discipline where horses are not being ridden, but are rather led by hand, and judged based on their appearance and movement. The Quarter Halter Horses who are bred for halter shows, have a conformation that is actually different from that of the iconic "working" Quarter Horses (see the 'American Quarter Stock Horse' breed.)

First, Quarter Halter Horses have a smaller, sometimes slightly dished, head. Secondly, they carry their neck at a higher angle than the angle of the "ordinary" Quarter Horse. Thirdly, they are much larger and more muscular than the average Quarter Horse. Finally, their legs tend to be thinner and straighter than those of other Quarter types, and their hooves are smaller.

Performance metrics:
The following are the: range, average, (SD), and MOE of performance metrics of ordered American Quarter Halter Horses in Horse Isle (not bred ones). In rare cases, horses might have metrics outside of the range. Breeders can produce horses that are beyond this range.

Speed: 15.4-17.4, 16.5 (0.4), 0.07.
Sprint: 67-91, 79 (5), 0.97.

Accel: 1.10-1.34, 1.22 (0.06), 0.01.
Decel: 1.04-1.24, 1.14 (0.04), 0.01.

Jump: 4.91-5.27, 5.12 (0.08), 0.01.
Pull: 2.86-3.66, 3.28 (0.16), 0.03.

Turning: 64.63-78.85, 72.53 (3.01), 0.59.
Reverse: 2.7-3.5, 3.2 (0.2), 0.03.

Stamina: 54.64-59.62, 56.96 (1.04), 0.2.
Reaction: 0.80-0.89, 0.85 (0.02), 0.00.

Coats & Height:
Colors: all colors except for dominant black.

Additionals: flaxen, linebacked, minimal-mealy, rabicano, roan, sooty, all rare patterns. The coat is always solid.

Height: 15hh to 16hh.

(See the 'American Quarter Stock Horse' breed for more information about the conformation of the Stock type.)