Done completely in inkscape. The mountain was a simple bezier curve and the base is an ellipse. The trees were a series of triangles converted to paths and handles tweaked to form the tree shape. The car was also a created with the bezier curve tool (love that tool).
I love the outdoors and hiking in the mountains. It wasn't hard to come up with this idea. I will most likely do more with the same theme.
A great t-shirt/illustration for the outdoorsman.