Egg Rock stands at the junction of the Assabet and Sudbury rivers in Concord, where they form the Concord River, and has long been central to the town’s river landscape. Native American stone relics have been found there, and nearby Nashawtuc Hill was the main local Massachusett settlement remaining in 1635 after epidemics. Local tradition linked the site to Simon Willard’s peaceful negotiations that enabled English settlement. Egg Rock also became part of Concord’s literary and recreational life through figures including Thoreau, Emerson, Hawthorne, and Daniel Chester French. Now within an eight-acre conservation parcel, it remains a popular landmark amid rivers protected in the National Wild and Scenic Rivers System.