If you dream about the horse, then such dream indicate strength, sexual aspects of your personality and liberty. Sometimes the horses are interpreted as those who brings the news no matter they are bad or good, but it depends on people who dreamt about it. When you are horse riding, then such dream indicates how well you are prepared and the fact that you trust yourself a lot. You have no issues with self-confidence. The color of the horse also gives an important message, which shows much more of the interpretation about the dream. For example, the white horses represent purity, love and affection, the black ones indicates the strength, the grey ones our ability to adapt in different circumstances or the wisdom. Piebald horse is the symbol of chaos, different energies and stress. The tan horses indicates the sexual aspects of your personality.
Read more about dreaming of Horse in other dream meanings interpretations.