That's what I was thinking. I was looking on Amazon at tie-out cables that are 30' even though I probably don't need that much. I guess you also buy like a metal stake to go in the ground? I see some people loop them around trees but I don't have many good sturdy trees in the backyard...does anyone know if these would be the "right" tools to buy? Or something similar? I also see that they sell the two together but the cable appears to be only 20 feet...that might would be enough for small games of fetch...any opinions appreciated!
https://www.amazon.com/Favorite-Tie...pID=51hbUX54AFL&preST=_SY300_QL70_&dpSrc=srch
https://www.amazon.com/Dogit-Cork-S...511183254&sr=8-8&keywords=leash+tie+out+stake
https://www.amazon.com/Favorite-Tie...pID=51hbUX54AFL&preST=_SY300_QL70_&dpSrc=srch
https://www.amazon.com/Dogit-Cork-S...511183254&sr=8-8&keywords=leash+tie+out+stake