1) live or work anywhere near Burbank
2) have a lot of old sneakers you can't donate to Goodwill
3) like recycling
I have a tip for you. You can drop off your old sneakers at the Burbank Recycling Center. They collect a big bin of old sneakers and then take them to a Nike Reuse-A-Shoe drop-off point in Santa Monica. Nike takes all the shoes and grinds up parts of them to make sports surfaces like tracks and tennis courts.
I dropped off a bunch of our old sneakers at the Burbank Recycling Center a couple of weeks ago. We actually had a big pile, since Dakota really wears out his sneakers pretty quickly, and, of course, he wears a size 15. So, they'll have a lot of material to recycle of his old shoes.