While pretty much all the hunters at a USEF rated show will compete with a braided mane, braided tails are a bit more optional. You tend to see them most in the rated divisions, but even there, it's not universal. Still, it's a really nice touch and completes the classic hunter look. There are several different ways to finish a braided tail. Probably the most popular option is the "pinwheel" in which the long pigtail is rolled up onto itself.I love all the colors in this bay silver pony's tail. You usually can't see the yarn because braiders do try to match it as closely to the hair color as possible. However, with an odd color like this, that may be impossible.
Close up of the braided tail and pinwheel. Notice how tightly braided this is. Model braids are often much too loose, resulting in a "fat tail" look. The top part should be quite narrow.
Here's another way to finish a tail. The long braided section has been folded up and tucked under the French braid.
And yet another finishing option. In this case the braid has been turned so it circles the tail horizontally.