This is a OpenTTD heightmap I made with MS Paint that comes standard with Windows. I made this using the mouse to draw with, it would maybe be better with a penlike device to draw with. See the how to on the right on how to make a scenario of a heightmap.

The heightmap below:

Colors used are:
Hills: # FFFFFF (Standard white)
Riverbank: #303030
River: #000000 (Standard black)

• Download the scenario file (without industry/cities) with this link
• Download the scenario file (with industry/cities) with this link