Awesome for dogs - Orange Screw Ultimate Ground Anchor

I have a 60 pound dog and have used this with her multiple times. Works in sand as well as in dirt. Takes a bit of time to put in, but it's definitely secure. Have used it at the beach as well as the park a few times. I set it up and then attach about a 10-12ft leash to the top loop keep her stationary.

Generally takes about 30 seconds to set up, depending on how firm the ground is. I think it would probably snap if you didn't put it all the way in, so it may not work in some terrains if the ground is too firm about 10-12" below surface.