Mormontown Site

Historical marker location:

Griggsville, Illinois

( Marker is on Illinois Route 106, 0.2 miles west of 427th Street, on the right when traveling west.)

Marker installed: 2005

The Chicago River was famously dyed green for the first time in 1962 to celebrate St. Patrick's Day. The tradition has continued every year since then, and now the river is dyed green for the holiday using an eco-friendly vegetable dye.