(DC) (National Park Service) Join us for our annual Rock Creek Park Day – this year over four days – on September 20-21 and 27-28, 2025. This event celebrates the founding of our national park. For the 135th Anniversary, we’re having a one-of-a-kind celebration: Punk Rocks! that blends DC’s legendary punk rock spirit with the park’s geologic, cultural, and cosmic stories. Visitors of all ages will discover why nature and green spaces matter – especially in cities like Washington, DC – through hands-on programs, live activies, and creative workshops.