Rummu tailings mountain (also Rummu ash mountain) is a tailings mountain in the northwestern part of Harju county in Lääne-Harju municipality.
Its absolute height is nearly 71m and its relative height is nearly 48m.
It was created as a result of limestone mining from the Rummu quarry and consists of a mixture of various limestone fractions.
The area around mountains offers many different activities, there is a beach, a water trampoline, diving and snorkeling, you can eat at a beach cafe.