Shake Your Shamrock is a family-friendly event in Lahaska, Bucks County, PA, organized in collaboration with local businesses and benefiting the Bucks County Opportunity Council. The event includes various runs and a costume contest with prizes from local establishments. Participants receive merchandise such as a hoodie and a finisher's medal. Amenities include free parking, easy registration, and onsite facilities, and the event is chip-timed for instant race results.