A man who has used Norland Moor for more than 60 years says action needs to be taken to prevent further damage to the beauty spot.
Brian Crowther, 71, from nearby Greetland, regularly runs and walks on the moor, but says the space is gradually being eroded as paths that were created for horse riders are becoming deeper, leaving scars on the landscape.
He wants to see a voluntary action group established to preserve the area, which he says will only deteriorate further if nothing is done.
He said: “The council dug up the paths so that horse riders could go out on the moor, but even they can’t use them because they’re so uneven.
“Over the last ten years it’s gone from being a muddy path to all these rocks being exposed and it’s only going to get worse.
“When it rains it’s absolutely swimming with water and silt, which then all gets channeled into the paths and gouges them out even more.
“I’ve been using the moor since I was a child and it’s the worst rate of deterioration I have known - the damage is accelerating.”
Mr Crowther fears people will be discouraged from using the moor if the paths continue to get deeper.
He added: “It’s a lovely area and we have to preserve these places. A lot of people use the moor to walk their dogs. When you get to the top, you have a 360 degree view of Calderdale.
“I have an elderly neighbour who says she never uses the moor now because she’s scared she’ll trip and break her ankle.
“We had a working party to clean up part of the moor when it was strewn with litter and a lot of people turned up to help. That’s what it needs, a proper community forum to maintain it on a regular basis.”