Plein-air (open-air) painters will be at work Saturday, June 11, from 9 a.m. to 4 p.m. at the Highlands Nature Sanctuary, 7660 Cave Road, just west of Bainbridge. Weather permitting, members of the Columbus-based Ohio Plein Air Society will work outside along the Sanctuary’s wooded, landscaped trails above the gorge of Rocky Fork Creek.