Creative idea sport event

I am looking for help with creating an exciting outdoor sport event that would be open to the public. I'm open to suggestions on the type of activity and equipment needed - after all, it should be a creative and original idea! I don't have any specifics in mind yet and so I'm asking for someone's help in fleshing out the details. Special requirements and supplies may be needed, so I'm looking for a professional who is creative and experienced in managing the scope of the project.