« All Events This event has passed. City Nature Challenge April 27, 2018 - April 30, 2018 Event Navigation « Lecture and Cocktails City Nature Challenge: Guided Hike » Add to calendar Google Calendar iCalendar Outlook 365 Outlook Live Details Start: April 27, 2018 End: April 30, 2018 Website: https://carnegiemnh.org/visitor/city-nature-challenge/