Let your eyes adjust to the moonlight, listen to the night sounds, and experience the darkness on this naturalist-led walk. (Equinox is morning of September 22.) Wear sturdy closed-toe shoes and come prepared for weather and insects. Walks canceled for unsafe weather or trail conditions. Free, register through Eventbrite by September 17: uw-madison-arboretum.eventbrite.com. Meet at the Visitor Center.