In Need Of A Long, Flat Map. Ideas?

[CS_Pickle]

I want to make a green screen movie with SFM. I have the footage,but I need a fairly large map that is fully flat on the ground to put the green screen on. The camera will be above the character as he is running. Does anyone know of any such maps, and how to obtain them?

Thanks!

[Pte Jack]

Check the maps available onhttp://sfmbox.com/category/maps/page/5/ There's one there called middle of nowhere.