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 New Mexico, equine law encompasses various legal aspects related to horses and horse-related activities. This includes the creation and enforcement of contracts for the sale, purchase, boarding, breeding, and training of horses. Additionally, New Mexico, like many other states, has an Equine Liability Act (NMSA 1978, Section 42-13-1 to 42-13-5) which limits the liability of equine professionals and event sponsors for injuries to participants resulting from the inherent risks of equine activities, provided that the required warning signs are posted and written contracts contain a specific warning statement. This act requires that participants be made aware of the inherent risks of equine activities and that they bear responsibility for their safety. However, the act does not grant immunity for negligent acts that may cause harm to participants. It is important for equine business owners and participants to understand these laws and regulations to ensure compliance and to protect their legal rights.