Trail Hikes, Every Saturday and Sunday.  A docent guides you on a journey through the Chattahoochee Nature Center trails using biofacts and activities to spark you “natural” curiosity.  1pm.  Admission:  $8/adults.  $6/seniors.  $5/ages 3-12.  Chattahoochee Nature Center, 9135 Willeo Road, Roswell.  More info:  770-992-2055.