Suicide at the Stanley Hotel (Estes Park, CO): Frederick Stanley, 1911

Yes. On May 25, 1911, Frederick Stanley (no relation to hotel founder F.O. Stanley) died by suicide in Room 217 of the Stanley Hotel, hanging himself from the shower rod.

The hotel, opened 1909, later inspired Stephen King's The Shining (1977). Room 217 is famously associated with paranormal reports (King stayed there; film used Room 237).

This remains the only documented suicide at the property.