There are many others but this is the only one I've ever encountered.
I use to drive by it on a daily basis but the road is now closed a few hundred yards south of this spot.
It had been so long I couldn't remember exactly where it was. I had to go there recently just to be able to find it on GSV.
But it's still there and with even more shoes than this 4 + year old shot.
(https://www.google.com/maps/@38.9500938,-94.5573272,3a,75y,290.23h,94.66t/data=!3m8!1e1!3m6!1sSp9ltD-BCcuTtKoKrgsLvg!2e0!5s20130401T000000!6shttps:%2F%2Fstreetviewpixels-pa.googleapis.com%2Fv1%2Fthumbnail%3Fcb_client%3Dmaps_sv.tactile%26w%3D900%26h%3D600%26pitch%3D-4.65531876745186%26panoid%3DSp9ltD-BCcuTtKoKrgsLvg%26yaw%3D290.2296221754658!7i13312!8i6656?coh=205410&entry=ttu&g_ep=EgoyMDI0MTAwMi4xIKXMDSoASAFQAw%3D%3D%5B/url)
There used to be one in the ghost town of Rice, California on CA 62. I want to say the shoe tree caught fire about 5-7 years back and actually burned down some of the remaining structures. If I renumber correctly, passerby's just began to substitute the tree for a shoe fence.
There's one in NE Seattle at 19th Ave. NE and NE 47th St. (Frat Row). Full of shoes. A couple of months ago after the first big windstorm of the season one of the big branches fell off full of shoes.