Clarksville 144th Annual Picnic at St. Louis Church Basic event infoEvent date: 06/25/2022 - 5:30pm to 6:30pmLocation: St. Louis Church, Clarksville 12500 Clarksville Pike St Louis Church 21029 Clarksville , MD United States See map: Google Maps Maryland US Public event fieldsSaturday, June 25 Performance - 5:30-6:30 pm on stage at the 144th Clarksville Picnic. Location: St. Louis Church, 12500 Clarksville Pike, Clarksville, MD 21029. More information here.