Indian Ladder Fossils. Look for signs of ancient life. Fossils found cannot be taken home. Trail is moderately rugged. Register 518-872-0800.  9:30 a.m. at Thacher Park Road Voorheesville, 12186

Mysteries of the Oceans: What is Really Down in those Waters? Please dial-in and join us to hear about interesting topics – it’s free and easy to join! Community Caregiver Lunchtime Chat. 1 p.m. using free conference line: 518-992-6661

Escarpment Bird Watching. Learn about some of the fantastic raptors that fly through Thacher Park on thermal drafts. We’ll take an easy walk and look for hawks, vultures, and possibly peregrine falcons. Bring binoculars. Register 518-872-0800. 11 a.m. at 830 Thacher Park Road Voorheesville,  12186

Thrift Shop Sidewalk Sale. Popular vendors, locally grown flowers, and handmade birdhouses. 9 a.m. to 2 p.m. at South Bethlehem United Methodist Church, 67 Willowbrook Ave, South Bethlehem. 

“The Living Landscape” Celebrating Native Plants. Find out how to create a living landscape in your own backyard. Find out answers to your gardening challenges. Register 518-872-0800. 11 a.m. at Emma Treadwell Thacher Ntr Ct.

All about porcupines. We’ll be exploring off trial in our hemlock forest to look for signs of porcupines and examining their special adaptations. Register 518-872-0800. 1 p.m. at Emma Treadwell Thacher Ntr Ct

“Explore a Bog” without wet feet. Register 518-872-0800. 1 p.m. at Thacher Nature Center.

Indian Ladder Trail walk. Descend the cliff and learn about the geologic history of the Helderbergs. Trail is moderately rugged. Register 518-872-0800.9:30 a.m. at Thacher Park

Medusa yard sale day.  No early birds please. Come to get a map at the church. Sponsored by Medusa United Church of Christ. 8 a.m. to 2 p.m. at Rte 351 in Medusa.

Trail Trek at the Nature Center. Explore the trails with our educators, with a focus on trail etiquette as we experience animal and plant diversity while walking through an old field and new growth forest. 10 a.m. at the Emma Treadwell Thacher Nature Center, 87 Stan Levine Dr, Voorheesville, 12186