At the top of the Fed Files Blog home page, you should see tabs that will take you to frequency lists of various federal agencies and offices. I have recently added some new tabs to include some frequencies that were requested by some blog visitors.
I have added tabs for the Department of Agriculture, which includes the Forest Service, and a tab for the Department of the Interior, which includes the Bureau of Land Management (BLM) and the National Park Service (NPS).
I will be updating and adding some specific listings for various parks and forests soon.