I have seen runners, walkers, and have personally biked it myself. I dont think there would be a problem as long as you respectful and run on just the roads and not the land. And let me add...if you are parents of small children, please dont let them crawl over the monuments. It is so disrespectful for the men who fought on these grounds and the many souls lost there.
I agree with Jill. Respect for your surroundings. Though please take a moment to stop and take in the view. Picture what these young soldiers must have been feeling. How frightened they must have been. Climb the little round top stairs. Check out Devil's Den. Take a moment to pray that the ties that bind us together are stronger than those that would tear us apart. Enjoy.
Thanks! Your answer is awaiting moderation.