Speedway (at least a lot of it in central Tucson) isn't a great place to be on a bicycle. I tried it early one morning last summer — as the sun was rising and before traffic got bad — to find murals I hadn't seen. (That's a lot easier to do at 10 or 15 miles an hour than at 35 or 40.) For some reason (maybe because my bicycle is an Iron Horse brand — great bike, by the way), all of the murals I spotted fit that theme. (Well, sort of. :)
The first was at Red Garter, 3143 E. Speedway:
At the other end of my ride along Speedway were two horses in a desert scene at Bookstore Southwest Adult Shop, 5754 E. Speedway (click to zoom in):
The last two horses (actually made of iron — or steel), were at Sir Veza's Taco Garage, on the corner with Swan:
P.S. I just noticed that Warren V. sent a photo of the Red Garter horse — more than two years ago — in Randy's post Horsin' Around at the Saloon. With more than 300 murals online here, this is another good reason for Melo's mural map... to help us prevent duplicate photos. In the meantime, thanks to Warren and Melo!
Update (September 22, 2020): I've posted closer photos of the wraparound mural on Bookstore Southwest. And Sir Veza's Taco Garage is gone.