A summer prairie walk led by Clifftop board member and SWIC biology instructor Laura Schaefer takes place at 9 a.m. Saturday, Aug. 20, at Paul Wightman Subterranean Nature Preserve, 3325 G Road, Fults. The walk will take place along the ADA accessible trail. Schaefer will help participants identify native prairie plants along the trail, teach about plant adaptations and prairie ecology. Meet at the pavilion. Dress for the weather and bring a drink to help stay cool. There will also be a prairie walk on Sept. 17. Find more details by visiting Clifftop’s Facebook page.