Hi Mel, the obvious walk which meets your criteria is the Greenburn Horseshoe from Grasmere. Steel fell, Calf crag, Gibson Knott and Helm Crag are the fells on the route best walked in that order. It is walkable the entire way with no knife edge ridges. I did it in January. The fells are all beneath 600 metres and is a great walk when the higher fells are clagged in. Other Horseshoe walks would include Fairfield, Kentmere, Ennerdale, Buttermere, Newlands Valley, Greenup, Great Langdale, Mosedale and Scandale which wouldn't really meet the criteria. Another possibility would be Loughrigg fell, Silver How, Blea Rigg and Tarn Crag from Rydal or Ambleside. Cat Bells and Walla crag from Keswick could be added to the list - great views of Derwent water. Hope this helps, Henry