The park itself does not close for rain, however riding on wet trails damages the surface and causes long-term trail sustainability problems. Please use your best judgement when riding trails and check this website for the most recent weather conditions, with specific focus on the rainfall: http://www.rainwise.net/weather/TWC30339. In general, if there has been .25" or more in the last day, it's probably not the best idea to ride. If you get to the trail, you can tell if you shouldn't be riding if your tires are making visible indentations in the trail surface. We'll update the most current first hand information via our Twitter feed https://twitter.com/sorbaatlanta. If you're dying to get on your bike and ride some dirt, the 3.1-mile gravel fitness loop is always open.