Semi-formal would be perfect! We are having our ceremony and reception outside in a grassy area so just avoid stiletto's- unless you're wanting to give us a free aeration service! A Few Ideas: Ladies: Summer dress, skirt, pants suit, jumpsuit/romper Gentleman: Suit, button up (short sleeve or long sleeve), polo, dress pants or shorts *Pro Tip: Dress comfy and for the weather! June in Idaho could be hot and dry, or cold and rainy and it can switch on the flip of a dime- so just remember a jacket!