Are you camping in the area? And I would think that experienced hikers even kids could make the halfway trip around... but you would need some climbing equipment and safety gear for portions on the far side of the lake (pictured). The beauty of the internet is that you can study all the paths and trails long beforehand and plan your routes.
The reason I asked about camping is that will help determine how long you want to take walking around the lake

Hiked all the way around the rim and it was one of the best days of my life

And yet none of you Apple sheep realize that your forward thinking engineers at that evil empire didn't come up with some way to turn it off quite simply before your going on roller coasters or skydiving or anything?? I don't get why you people wouldn't complain about such an obvious oversight...