This May 14, 1951, article “Life Goes Ridgerunning” from Life Magazine used to be posted in full on the Yakima Ridge Runner’s website, but that site appears to be no longer active. So, you’ll find it below.
If you’ve never seen the color footage of the Ridge Runners jeeping in the Cascade Mountains, that’s worth a throwback look: http://www.ewillys.com/2011/03/29/2-more-videos-from-jpzombie-com/
And, there’s the widely circulated set of two videos that may have been filmed at the same time the writers of the magazine article were visiting Yakima (video 1 and video 2)