How far down in the earth are metamorphic rocks?

Metamorphic rocks can form at varying depths within the Earth's crust, usually ranging from about 5 to 30 kilometers (3 to 19 miles) below the surface. The specific depth at which they form depends on factors such as tectonic activity, temperature, and pressure conditions. Generally, they are created through the alteration of existing rocks (igneous, sedimentary, or even older metamorphic rocks) due to heat, pressure, and chemically active fluids.