Sheffield is known for its seven hills, which you might think a disadvantage to the leisure cyclist. NCN 627, however, clings firmly to the bottom of the Don Valley, neatly limiting the climbing you have to do. There's just one sharp ascent, where the route transfers from a riverside path to one on the valley side in Oughtibridge. Soon after, it picks up a railway path into Penistone, including a crossing of the sturdy Rompticle Viaduct. The last few miles into Kirkburton are on minor roads and rather more hilly, but with superb moorland views.