Fall Trail Day October 18, 2025 Hike, bike or run to join us for Trail Day at the Arboretum! Join us as we celebrate all things trails with guided trail walks and other activities. Nearly all our 10 miles of hiking and biking trails are reopened, so you can also choose your own adventure. Check back soon for more info. This event is part of Fall for the Arb! Celebrate fall with a series of events and happenings throughout September and October! The North Carolina Arboretum is excited to welcome this season with nature programs, education, music, art and more!