“camping” section of guide covers it all.

Thank you!

R2R2R is much harder than Four Pass loop – 20 extra miles & 3k in extra vert. Purely from a running standpoint, the trail (conditions) on 4 is overall much better than R2R2R though. The descent from the south rim is sort of a mess, especially if you hit it once the mud has dried from all the donkey/human traffic. You can run it, but not the smooth single track like most of 4 pass. The North rim climb goes on forever but a lot is runnable where the south climb, especially with that many miles on your legs, is rough. 4pass you get very challenging climbs as well, but a lot of runnable terrain in between and the views on the 4pass loop are far superior to the Grand Canyon (in my opinion).

Both present their challenges but from a “challenge” standpoint, r2r2r takes the cake.

The trails on the R2R2R look far more maintained and runnable for someone like me. And the descents seem easier. Obviously 20 miles longer about 3500 feet more climbing though!

Would love your thoughts on how they compare!