Thousands of runners face disappointment this weekend due to dumped rubbish affecting parts of the Calderdale Way relay.
Parts of the 50-mile race, which takes place on Sunday, have been subject to flytippers dumping waste on land.
Race organisers say they now face embarrassment as participants prepare to make their way to the district for the event.
Local farmer and PR officer for race organisers Halifax Harriers, Frank Chislett, said: “Apart from it being unsightly it just ruins the whole scene of the area.”
He added that it “was a ridiculous state of affairs” that due to the waste being dumped on private land including Crooked Lane in Holmfield, the council aren’t obliged to clear up the mess, meaning responsibility lies with the landowner.
Mr Chislett said: “As far as the runners are concerned we can do without this on the route.
“People coming into Calderdale want to see it at its best. It’s a beautiful desirable area and it’s been spoilt.”
Another runner expressed his concern.
Stephen Grimley said: “The biggest impact is that we’ve got thousands of visitors coming to enjoy the Calderdale Way. It’s going to be a bit embarrassing if people come here to face this on Sunday.”
Sunday’s race involves teams of 12 split into six legs leaving two people from each leg to compete in pairs.
All of Calderdale’s running clubs are expected to take part in the event including Halifax Harriers, Calder Valley Fell Runners, Todmorden Harriers and Stainland Lions.