The Enumclaw horse sex case was a series of incidents in 2005 involving Kenneth D. Pinyan, an engineer who worked for Boeing and resided in Gig Harbor, Washington; James Michael Tait, a truck driver; Douglas Spink; and other unidentified men. Pinyan and Tait filmed and distributed zoophilic pornography of Pinyan receiving anal sex from a stallion under the alias "Mr. Hands". After engaging in this activity on multiple occasions over an unknown span of time, Pinyan received fatal internal injuries in one such incident.

The story was reported in The Seattle Times and was one of that paper's most read stories of 2005. Pinyan's death rapidly prompted the enactment of a bill by the Washington State Legislature that prohibits both zoophilia and the videotaping of such an act. Under current Washington law, it is now a Class C felony punishable by up to five years in prison.

As zoophilia was legal in Washington state at the time, Tait was instead convicted of trespassing and was sentenced to a one-year suspended sentence.