In1997 the winery was named for the majestic oak tree that marked the driveway in honor of the owner, Glenn. The oak tree died a natural death in 2006. It has been preserved and now proudly displays the hand-carved OakGlenn nameplate residing at the wine pavilion. The winery is located 25 miles west of Washington, Missouri, two and a half miles east of Hermann just off of Highway 100.