PokerTracker

I'm either not familiar enough with the logic/language of the filters or I'm just an idiot.
I hope its the first.

I've tried stuff.

I want to see all my river bluffs... where they fold and where they didn't.

How?

I don't know what you've tried or where you are having trouble but you can filter for your river hand strength via 'Hand Details -> Made Hands' and add board texture filters so you can see specific types of hand strength on specific types of boards. If you need to group a number of different filters together see this guide:

Guide: Grouping Filters

Bear in mind that , for example, you might be betting one pair hands for value and in others doing it as a bluff depending on board texture and/or a read on your opponent so there isn't a straightforward method to define what hands you are bluffing and those you are not.