In the United Kingdom, we have very detailed mapping available via the government-run Ordnance Survey. Their maps, while not best suited for long distance navigation are invaluable for outdoor activities, due to the level of detail and landmarks available, especially on the 1:25000 Explorer series. See below for an example.
I can see that the US equivalent agency, USGS, produces detailed topographic maps (and available to download for free) of much, if not all of the country. However these seem to be lacking in detail in terms of paths, landmarks, facilities, vegetation etc. Are there any US maps better suited to outdoor pursuits than the USGS topo maps?
It occurs to me that the US may not have a single national answer to the question. If it helps, I'm interested especially in Yellowstone and Grand Teton national parks and surrounding areas, and areas close to Idaho Falls.
Paying for the maps is not a particular concern (although cheaper is always better). It would be useful to know what the availability (local stores, book stores, gas stations, internet/ etc) of suggested maps is.