Cornish Christmas In Grass Valley Chris Remington Tuesday, December 12, 2017 | Sacramento, CA Listen / download audio Update RequiredTo play audio, update browser or Flash plugin. Jackson Starr / Courtesy Every December downtown Grass Valley transforms into Gold Rush era California foothills. This year marks the 50th anniversary of Cornish Christmas in Grass Valley with live performances, locals dressed in Victorian clothing and plenty of local gift shops. The event’s storied history in the region has brought tourists from around the country. Marni Marshall, Gage McKinney and Elanor Kenitzer explain the history of Cornish Christmas and its focus on folktale traditions.