If you are fit, you can absolutely do this. In fact, you can go all the way to the other rim and back (rim-to-rim-to-rim). The current record is sub 6 hrs by Ul

If you are fit, you can absolutely do this. In fact, you can go all the way to the other rim and back (rim-to-rim-to-rim). The current record is sub 6 hrs by Ultrarunner Jim Walmsley. [0] https://fastestknowntime.com/route/grand-canyon-crossings-az https://fastestknowntime.com/route/grand-canyon-crossings-az