Located in the upper West area of Montgomery County, near to Sugarloaf Mountain, is this secluded and historic place.

Monocacy Cemetery occupies the property that was the former Chapel of Ease of All Saints parish of Frederick County, known as Monocacy Chapel, which stood as early as 1747 in which prayers for peace were offered during the Revolutionary War.

In 1770, when the parish of Montgomery expanded, the St. Peter's Episcopal Church took possession. During the War of 1812, it became a camping ground for the American forces.

In 1849, the congregation moved to a new church in Poolesville, leaving the old church to fall into ruins. In January of 1872, the vestry of St. Peter's transferred the churchyard over to the newly formed Monocacy Cemetery Society of Montgomery County, which included Frederick Sprigg Poole, Dr. N. Brewer, William Wallace Poole, Howard Griffith, Nathan White Allnutt, John A. Jones, and Isaac Young. Burials began taking place shortly afterward, though there are many stones from the original chapel still surrounding the rebuilt chapel.