BLM? DMA?
What are those?
Bureau of Land Mangement. It is a fairly well known agency. Perhaps, you live in the city, regardless- look it up. You can get all area USGS maps for at least five counties, perhaps more. You can also order a specific route by area. The maps run about $11.00 each, or at least did a couple of years ago. Get to it.
We proles pay a lot of money for various parts of our government to produce maps.
/johnny