Per the geocaching blog:
"Save the Earth while geocaching? Yes please! We call it CITO (Cache In Trash Out®). In 2017, geocachers around the globe will gather together during the weeks of April 22-30 and September 23– October 1 to pick up trash, remove invasive species, repair trails and more—plus earn a pretty sweet new souvenir."
Time: 3:00 pm to 4:00 pm
at the posted coordinates, please bring your own gloves and pickers. I will supply the bags.