Early in March 1848, W. Sidney, S. Willis, and Wilford Hudson, members of the Mormon Battalion, set out from Sutter's Fort to hunt deer.

R. C. Chambers had moved to Mormon Island in July 1850, prior to his mining successes in Montana and Utah.

What was left of Mormon Island was eventually razed, as the Folsom Dam project was set to flood the town.

The only visible remnant of this community is Mormon Island Cemetery,[3][4] a relocation cemetery located south of the lake on the dry side of Mormon Island Dam (off of Green Valley Road in Folsom, California).

The canal was used to divert water in an effort to find gold deeper within the river bed.