Where do you get rid of used hydraulic fluid?

[Comancheria]

Tractor dealership and auto dealerships may let you use their used oil dump.
I’m lucky because my local auto parts guys love me because I always
Clean everyone else’s mess from the top of the oil dump after I dump my oil and they let me dump any oil , trans or hydraulic oil .
I take my used antifreeze to an independent foreign car repair shop and dump it in their tank.
I usually wait until I have several jugs and I take a pizza over to them right before lunch time and ask to dump my coolant.
They’ve never said no to that.

 

[goeduck]

I have taken oil to O'Rielly's. They have accepted whatever oil I had.

Same here or to the local transfer station.

 

[WinterDeere]

Tractor dealership and auto dealerships may let you use their used oil dump.

Our state DEP has a link on their site where you just enter the material you're looking to unload (eg. "oil"), and it pops up a map and list of drop-off locations:

 

[MutantGenepool]

Autozone and Advanced will take my used motor oil without question but when i asked them about hydraulic oil they said they couldn't take that.

Where do you get rid of it?

Put it in 20L drums and sell it on Facebook. Someone will buy it.