Image Sand Creek Massacre visitor center closing for one day Entrance sign at the Sand Creek Massacre National Historic Site. © KiowaCountyPress.net / Jeanne Sorensen Sand Creek Massacre National Historic Site Visitor Center in Eads will be closed April 14.The massacre site itself will be open as usual from 9:00 a.m. to 4:00 p.m. Sand Creek Kiowa County Eads Sheridan Lake Haswell Chivington