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The perfect Wainwright round, according to the map
We built a map of every path, track, bridleway and road in the Lake District and asked it for the quickest continuous round of all 214 Wainwrights. The answer comes out longer, hillier and slower than the actual record — and that is the point of the piece rather than a flaw in it. People who set records here do not follow paths; they run the direct line over open fell and down trods no survey has recorded, and none of that ground exists in the map data, so none of it exists in our graph. Our round is longer because we deleted the ground they actually run on. It is a model output rather than a walked time, and best-found rather than proven optimal — we publish the solver, its settings and its compute budget so anyone can beat it. Along the way it turns up something we did not expect: the shortest round is the hilliest round, because minimising distance drives the line straight over tops instead of round them. Read the piece →