The route is Wetton, Wetton Mill, Butterton, Warslow, Ecton Hill, Alstonefield, Coldeaton Bridge, Milldale, Hall Dale, Air Cottage, Ilam, Rushley, Grindon, Wetton. With the 'improved' route over Ecton Hill the mileage is just short of 25 (map) miles. There is 1520m of ascent.
You can use the interactive controls to zoom in and out and to move around the map, or click on a marker for more info. (interactive map help)