On Saturday, June 24th, at 1 pm, join the Wissahickon Valley Watershed in a hike around Four Mills Reserve and learn about the elements of journaling and recording experiences in the natural world. Registration is required and members and children under 12 are free. Non-members are $10. Materials will be provided. The Four Mills Reserve, WVWA Headquarters, is at 12 Morris Road in Ambler.