To answer some of your questions, Yes, this is an all breed, all discipline sport. You can ride in any tack and attire of your choice at the lower levels, Competitions in the USA are still few and mostly run by Iberian horse breed associations, because the sport originated in the countries of Spain, Portugal, Italy, and France. It is a sport to show the handability of a good working horse, what we call in the USA a ranch horse or versatility horse.
It is more fun then you have ever had on your horse no matter what you ride anything from Dressage, Reining to Extreme Cowboy Races, Working Equitation will take you to a new level and you will love what it does for your horsemanship. There are 3 phases in all standard competitions and a 4th phase at all championships. To see lots of pictures and gain more information please join our Facebook page: Working Equitation: The United States Working Equitation Association