Saturday, May 31, 10 a.m.-3 p.m. – Bring your canoe or kayak and join the Georgia Botanical Society and National Park Service Naturalist Jerry Hightower for a leisurely, 3-mile float on the Chattahoochee River. Travel from Powers Island to Paces Mill at U.S. Highway 41, exploring plants, geology, wildlife and late spring wildflowers. Bring lunch, water, binoculars and camera. Don’t forget a hat, rain jacket and sunscreen. $3 daily park pass. Not required for those with an annual park pass. 5862 Interstate North Parkway, Sandy Springs, 30328. Call 678-538-1200 to register or go to: www.nps.gov .