Contrary to the belief that many have thought was a myth, it is true that alligators are in fact able to climb fences. Alligators have sharp claws and powerful tails that enable them to push their bodies up. Young alligators are agile climbers and adult alligators have even been known to climb fences in order to get to water or escape captivity.
It is for these reasons that low fences are not sufficient protection for pets or children in areas where alligators may be present. It is recommended that fences be more than 4.5′ tall if you are attempting to keep alligators out of your yard. Anything lower than 4.5 feet the alligator will most likely be able to climb over quickly and with ease.