Here 'tis, straight from the Girl Scout Pocket Songbook, copyright 1956:

MY HOME'S IN MONTANA
Traditional U.S. Cowboy Song

My home's in Montana, I wear a bandana
My spurs are of silver, my pony is gray;
When riding the ranges, my luck never changes,
With foot in the stirrup I gallop away.

When far from the ranches, I cut the pine branches
To lay out a bed when the starlight is pale;
When I have partaken of beans and of bacon
I whistle a merry old song of the trail.