I recall running a pre-generated mod years ago, where the NPCs were performing tracking (survival) checks to make their tracks more obscure to the party hunting them. I have been using this since then when it came up both as a judge and as a player (as GM allows), however, the other day I realized that I am not sure what the actual source/rule was. In pre-generated, it is extremely difficult to figure out the difference between author off the cuff stuff and actual rules unless they cite...even if I still had the mod to reference. I checked survival in the SRD and it does not mention anything about this. EDIT: As noted below, I did find that you can make a track check to add +5 to the DC of people following you. What I recall was more a versus DC however, where a ranger with a +20 to survival would be better at counter-tracking than a ranger with +3.
Are there (further) known rules as written for counter tracking?
Cited passages are cool, but I have a lot of books, so if it's a bunch of time to type stuff up, book references (maybe with brief concepts) are also appreciated and I can hopefully reference myself. Thanks!