This is the site I use to track fires during the summer, they may have a fire history section.
http://www.nifc.gov/fire_info/nfn.htm
There should be a website for whichever National forest you are hunting in. If you call the office they are usually very helpful, and some of there websites have last years fire maps on them. Sometimes you can use the past fires to your advantage since it will create habitat, and or concentrate game in non burned drainages.