Two older men on horseback, They are on a town street (for a festival?) with buildings behind them

Description: 

Copy of older photo. Two older men on horseback. Man on left wears a camouflage-like shirt and pants, head scarf and multiple necklaces; man on right wears European clothing, a necklace, and broad-brimmed hat. They are on a town street (for a festival?) with buildings behind them

Location Description: 

Washington