Wednesday, August 16, 8:00–9:30am https://arboretum.harvard.edu/events/event-signup/?id=76655 Join Arboretum docent Lisa Gaquin for a brisk early morning walk along the inside perimeter of the Arboretum. This 3.5 mile walk will be fast-paced, energetic, and will involve walking over hills and rough terrain. Bring good walking shoes, water, and walking poles if desired. FREE. Registration required.