I believe 7 western states passed the equine law many years ago, because Ins rates were going through the roof and putting horse riding co's out of business.
The Wyoming equine liability provisions immunize equine professionals by declaring that those who engage in equine activities or any recreational activities assume the inherent risks in the sport or recreational opportunity.
(a) Any person who takes part in any sport or recreational opportunity assumes the inherent risks in that sport or recreational opportunity, whether those risks are known or unknown, and is legally responsible for any and all damage, injury or death to himself or other persons or property that results from the inherent risks in that sport or recreational opportunity.

(b) A provider of any sport or recreational opportunity is not required to eliminate, alter or control the inherent risks within the particular sport or recreational opportunity.
Part of the law.