Tracking a flying creature

[Sirperry]

Any guidance on determining DCs for tracking a flying creature? I recall seeing some high level DCs once upon a time but cannot seem to find them.

[ShurikVch]

The Legendary Tracker (https://www.d20srd.org/srd/epic/feats.htm#legendaryTracker) [Epic] feat, DC 120

[Sirperry]

Thanks ! That is what I was looking for.