Don’t worry about crowds on this forgotten run in the glacial-carved valley of northeast Iowa. The Upper Iowa can be paddled for 110 miles from Lime Springs to the Mississippi, but a good 31-mile jaunt from Kendalville to Decorah snakes through cliff-lined gorges below 200-foot-high chimney rocks. Bald eagles frequently soar over the limestone outcrops and deer, mink, raccoon and beaver call the area home. Chimney Rock rents canoes, offers trip planning, and provides a free shuttle.