National Park Typeface
In case your brain is thinking "wait; I thought it'd be that cool scripty typeface on the oddly-angled signage?", you might be thinking of the USDA's logotype for National Forests. Unfortunately, there isn't an available font for that exact face. Some cool specs, though, in the Forest Service's design guide: https://www.fs.usda.gov/Internet/FSE_DOCUMENTS/stelprd381002...Section 1-18 (page 24) of the linked PDF has examples of the "National Forest", "National Monument", etc. logotype; Chapter 8 has some more signage specs.