- This event has passed.
2025 Warren County Prime Beef Festival
September 3, 2025 - September 7, 2025
Since 1948, Monmouth, IL has been home to the Warren County Prime Beef Festival, featuring a Princess Pageant, Livestock Shows/Auctions, Local vendors, Amusement Rides, a Demo Derby (Saturday 9/6), and Figure 8 Races (Thursday 9/4 and Friday 9/5).
