WEBSep 4, 2024 · Celebrate Clark County’s Mule Festival: Sept. 19-21. By Editor | September 4, 2024. The Clark County Mule Festival will be held from Sept. 19 – 21, 2024, marking the 38th annual event at the Clark County Fairgrounds, located on Business Route EE or 23130 East Main St., about one mile east of Kahoka, Missouri.