Foo Fighters have a few months until they'll be in Colorado, but on Sunday night, they brought the Rocky Mountains to Fenway Park in Boston

The Foos were joined on stage by rocker Joe Walsh (of James Gang and the Eagles), who, supposedly, penned the song 'Rocky Mountain Way' one day while mowing his lawn in Colorado.

I'm living in Colorado and I'm mowing the lawn. I look up and there's the Front Range of the Rocky Mountains and there's snow on them in the summer. And it knocked me back because it was just beautiful. ..it's too late to regret the James Gang. The Rocky Mountain way is better than the way I had... I got the words. Bam!  - Source:Society of Rock

Walsh also spent a bit of time at Caribou Ranch in Nederland. Watch the Foo Fighters team up with Walsh for 'Rocky Mountain Way' here: