Guam - As part of Earth Month activities, this Saturday there will be a free hiking event. families are invited to see one of Guam's natural wonders at 1pm in Tumon Bay. Hydrogeologist Ramon Camacho will lead a guided tour of Tumon Bay to find areas where the Northern Guam Lens seeps into Tumon Bay. The hike is about 2 hours long. If you're interested, meet at the Ypao Beach lifeguard tower and bring a water bottle, sunscreen and sturdy shoes.  For more information and a complete listing of earth months events go to http://epa.guam.gov