North Kaibab Trail is one of the most beautiful trails in Arizona. The long day hike from the trailhead to Roaring Springs offers incredible views, birdwatching, and wildflowers from beginning to end. It is not a trail for the faint of heart, but it is well maintained and well shaded unlike the south rim trails.
Make sure to bring plenty of water. There are water stations at the bathroom near Supai Tunnel and again at the ranger station below Roaring Springs, but none are available thereafter until the Cottonwood Campground. Snacks are also a must! It's a long day—from six to nine hours—so make sure to stayed fueled throughout the hike.
If you chose to run the trail, make sure to watch for blind switchbacks. Mule trains frequent this trail for rides and hauling. When you encounter a mule train, please step to the side of the trail and wait for them to pass.
Mules have played an integral part in creating and maintaining these trails. Even before the completion of the North Kaibab Trail in 1928, mule teams have been used to haul supplies and people from rim to rim. If you'd like a ride down the trail on a mule, find more information at the visitor center or at the trailhead.
Overall, this is a highly recommended trail! The North Rim as a whole is a must-see if you find yourself in Arizona. They have beautiful cabins you can stay in for as low as $143/night.
The trail is closed from October 15 to May 15.