[agracier]

Got this so tried to texture it but it looks to stretched

Maybe you could try resizing the textures that make up the canyon walls. In your load.ini, put ',2' or ',4' or even ',6' at the end of the line which contains the texture for that part of your map ...

ex:

Mount3 = land/summer/Spain_Tex_512_07.tga

becomes

Mount3 = land/summer/Spain_Tex_512_07.tga ,2

Don't know if it will necessarily help, but it's worth trying out.