Summer hiking season has begun along trails like the Cave Spring Trail, beginning at Devil's Well, an Ozark National Scenic Riverways Park about 23 miles south of Salem, Mo., off of KK Highway in northwestern Shannon County. Devil's Well is a deep sinkhole with runoff that empties into a narrow opening that drops 80 to 100 feet to the surface of an underground lake, eventually joining the Current River at Cave Spring. The trail, about a 5-mile loop, offers many opportunities to see native wildflowers, insects, reptiles, birds, and other wildlife. Here a great spangled fritillary, the larger butterfly, is surrounded by pearl crescent butterflies as all rest on a damp spot on the trail floor. Cave Spring Trail is a loop trail about 5 miles long, one of many miles of area trails, rivers, and parks managed by federal and state agencies for the enjoyment of hikers, campers, and floaters. Ozark National Scenic Riverways and Missouri state parks in Shannon County include Round Spring, Akers Ferry, Echo Bluff State Park, Ally Spring and mill, and Rocky Creek Conservation area, all within 30 miles of Eminence.