When: Second Saturday of every month, 8:30 a.m.-1:30 p.m.
New members welcome. There are no age restrictions; however, youth under the age of 18 must have parental permission and appropriate adult leadership. Workdays are scheduled each month unless otherwise noted on the website, at the Park Service Area behind the visitor center. Work days will be canceled under the following weather conditions: The temperature is 40 degrees or below in the morning, rain is forecast for the day or heavy rain the night before.