The Lynch Quarry Site, also known as the Lynch Knife River Flint Quarry, is a historic pre-Columbian flint quarry located near Dunn Center, North Dakota, United States. on the National Register of Historic Places and was further designated a National Historic Landmark (NHL) in 2011. Flint from the site was reportedly used to make weapons and tools for over 10,000 years from approximately 11,000 BCE to 1600 CE.[3][4][5][6]