My friends say I was building a Roman road. Not quite, but now I know how they (slaves) must have felt building it.
I started with stakes and set a string between the top and bottom of the incline. I wanted a ramp as opposed to the natural 'concave' shape that created a steep dip-down, that made it difficult and dangerous when towing trailers with materials.
About mid-way down this ramp where the natural shape of the slope created a dip, rocks were cemented-in about 18" deep.