Tuesday May 10 2011 comments Clarksville Day 2011 By: Telegraph photography by Dan Zahra -A +A Buy This Photo Now dan zahra ? the TelegraphPony Express rider Cassey Holbrook dashes off on her mount during a demonstration Saturday at the Clarksville Day celebration in El Dorado Hills. Locals cover their ears as the Mormon Battalion fired off their replica cannon during Clarksville Day, May 7, in El Dorado Hills. The large percheron equine team was a massive sight to see during Saturday?s Clarksville Day Celebration. Emma Stevens, 7, of El Dorado Hills, tries her hand at gold panning during Clarksville Day, May 7. Jeff Shinn, of Shinn Ranch Percherons, held the reins Saturday on his team of percherons as he carted visitors to the Clarksville celebration.