I wouldn’t recommend it. AllTrails currently has it listed as 6.6 but it’s longer than that. The NPS website lists just tunnel slot out and back at 7.2, geometry tells me that if you take a roundabout way back via zebra slot instead of the straight line it has to be longer than 7.2. We clocked it at right around 7.9.

The slots were cool but I’m not sure the 7.8 miles of hot, blah dessert with zero shade was worth it. If I were going to recommend anything to people it would be just do Zebra slot out and back (5.7 miles) and make sure to do it early or late don’t be out in the middle of the day. The tunnel slot wasn’t very exciting and those three extra miles in the July heat really sucked.