Silver Cliff Cemetery is a cemetery established in the early 1880s outside Silver Cliff, Colorado, about a mile south of State Highway 96 on Mill Street (County Road 340).

The cemetery is still in use today and is owned and operated by the Town of Silver Cliff.

[2][3] These lights were seen for the first time by a group of miners who took the cemetery as a shortcut to get to the town more quickly.

Researcher and writer Karen Stollznow investigated the cemetery, and wrote that there were several possible natural explanations for the coloured lights, such as a receptor on the retina of the eye sensitive to the colour blue, or the effect of phosphenes, brief flashes of light perceived by the eye, sometimes induced by eye movements, "which would also explain the lights “dancing”, “floating” or “darting” across the cemetery."

Stollznow reports that not all visitors see the lights, supporting her conclusion that "seeing lights during darkness in Silver Cliff Cemetery is a personal experience, likely caused by a person’s eyes and mind after they have spent many hours determined to “see” something.