The trail of rubbish extends for dozens of metres at Turner's Hill in Rowley Regis.
Household waste, carrier bags and even a doll's head are among the pile of rubbish at the site, which is off Portway Hill and a short distance from a huge phone mast which can be seen for miles around.
The scale of the rubbish which has been dumped has caused disbelief and outrage in the area.
A stunned Councillor Maria Crompton encountered the tip while driving past and couldn't believe the fly-tippers had managed to dump so much waste without being seen.
She said: "It's absolutely disgusting. If it was brought in a lorry or van it must have had to have reversed in to drop it all off. There is got to have been several lots.
"It looks like they have got through the gate to access the driveway.
"Somebody must have seen something so if anyone did I hope they will come forward."
The clean-up process looks to have been made complicated as the land is thought to be owned by telecoms giant BT.
Councillor Crompton said it was the worst example of fly-tipping she had ever seen.
It is unclear how long it will take for the rubbish to be cleared.
Councillor Crompton said: "It will be a nightmare to clear up. Environmental Health and the security people have been informed."
It is the latest in a long line of fly-tipping incident across Sandwell in recent months.
Last month, bags of rubbish including broken chairs, carpets and clothing were dumped outside Langley Green station in Western Road.
That came after shameless fly-tippers were caught on camera dumping two sofas in a dumping hotspot in Smethwick.
The brazen duo were snapped in Foundry Lane getting out of a white van and unloading the sofas before driving off.