Flickr user T Hoffarth recently traveled to the Malibu Creek State Park in California, where external shots for M*A*S*H were filmed, and took photographs matching scenes from the series. Here’s how the mountains looked in the opening credits and how they look today:
Additional comparisons can be found here, here, here, here and here. A comparison between the opening credits of the movie MASH can be found here. T Hoffarth also took some photographs of the remnants of the M*A*S*H set, complete with rusted vehicles and the new reproduction of the famous signpost placed there in 2008. The photographs were uploaded on November 6th.
Thanks to T Hoffarth for making this great photographs available. I stumbled upon them yesterday morning but for the life of me cannot remember what I was searching for at the time.