Check out some tire sellers, they may take your tires, if not, if the tires are not in really bad shape, list them on Craigslist for free. I have actually done that and it worked.
Take them to a tire dealer. You may need to pay a couple of dollars per tire disposal fee, but it's the right thing to do for your neighborhood and the planet.
The wonderful thing about tires is that are engineered to high level of standards. They are very balanced at it center of balance and a static run out of less than thousands of inch. Go to a hill and just let gravity do its thing. You can always depends on gravity, it will always be there for you and never let you down.
Any of tyre retailer will take your used tyres. You Just take off your tyres to thier place to yourself.
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http://stoneequipment.com/
Any tire retailer will take them, but they will not pick them up at your residence. You will have to bring the tires to their establishment yourself.