Equine law is generally defined as the body of law (statutes, court opinions) that governs the ownership, buying, selling, riding, breeding, racing, training, handling, insuring, and boarding of horses—and membership and participation in related organizations and activities. For example, contracts often define these transactions, relationships, and activities, and statutes often limit the personal injury liability of owners and operators of equine-related events and activities.

In Arizona, equine law encompasses various legal aspects related to horses, including ownership, sale, riding, breeding, racing, training, handling, insuring, and boarding. Contracts are commonly used to outline the terms and conditions of these activities and relationships. Arizona's equine law also includes specific statutes that provide liability protections for equine owners and operators. One key statute is the Arizona Equine Activity Liability Act, which limits the liability of equine owners and professionals for injuries or deaths resulting from inherent risks associated with equine activities, provided that certain conditions are met and warning signs are posted as required by law. However, this immunity is not absolute, and exceptions exist where the equine professional or owner has displayed negligence or failed to ensure the safety of participants. It is important for those involved in equine activities to understand these laws and to draft clear contracts that define their rights and responsibilities.