Big Nose Kate's Saloon is reportedly haunted by various spectral beings, including cowboy spirits and the ghost of "The Swamper," who is said to guard a hidden treasure in the basement's mine shafts. Haunting phenomena include phantom singing and talking, unexplained cold spots and gusts of air, lights turning on and off, camera malfunctions showing hazy forms, and the sounds of heavy footsteps and moans, particularly near the basement stairs. A former worker who found a valuable silver vein in the basement's mine shafts, he is rumored to still guard his treasure, often seen in the basement and on the stairs. Witnesses have reported seeing spectral cowboys at the bar, in doorways, and in the basement. Guests and staff have heard phantom singing, talking, and moaning in otherwise empty rooms. Extreme cold spots and unexplained gusts of cold air are frequently reported throughout the saloon. Silverware has been seen flying off tabletops, and mannequins on the balcony have been moved or tossed about. Cameras often malfunction, producing inexplicable hazy blurs in photos and videos. Reports include the sounds of heavy footsteps, especially on the stairs leading to the basement. The current building started as the luxurious Grand Hotel in 1880. The building's basement features a tunnel to abandoned mine shafts, where the Swamper discovered a significant silver vein. The building has a long history of lively activity, including its time as the site of a 24-hour gambling hall, theater, and brothel.