Initially, its primary function was to serve as a local storage facility for hay to feed Henry Miller's cattle and horses.

[3] In 1962, a portion of Glen Farm was generously donated to the city of Gilroy by an interim owner with the intention of establishing Christmas Hill Park for public access.

In 1990, with the support of the Garlic Festival Association, the city acquired the section of Glen Ranch adjoining Christmas Hill Park, which also included the barn.

In 2013, the city opted to proceed with the demolition of the barn, sparking public concern and initiating a movement aimed at preserving and restoring this historic structure.

[9] In April 2020, the Santa Clara County Board of Supervisors, acting on the advice of the Historical Heritage Commission, granted the Miller Red Barn Association a sum of $297,008.

This windowless barn showcases a unique architectural feature: a wide gabled transept that spans the width of the structure, positioned approximately two-thirds towards the rear.

This design allows for the convenient passage of horse-drawn vehicles, enabling them to load and unload cargo and exit on the opposite side without needing to turn around.

This barn holds historical significance under Criterion A within the field of agriculture due to its integral role in the production of prunes, apricots, and wine grapes in the southern region of Santa Clara County, California.