use a variety of resources when planning a dirt road adventure.
National Forest and National Park maps, published books and the
internet are my primary tools. The following books are the back
bone of my library. Backcountry Adventures by Peter Massey and
3 books by Tony Huegel, California Coastal Byways, California
Desert Byways and Sierra Nevada Byways. I use an inexpensive Magellan
GPS system and it's associated map software with an inexpensive
old lap top PC - to take into the field in case we need to re
plan our routes. Books are a great starting point, but keep in
mind that the data on them can be dated even before they are published.
Roads are added and or removed and road conditions constantly
change. So it doesn't hurt to ferret out data from the internet
or National Forest ranger stations. Good luck and as a good Boy
Scout will tell you - Be Prepared.