South Kaibab Trail
The South Kaibab Trail begins near Yaki Point on the South Rim of the canyon.  It's a 7.3 mile hike from there to the Bright Angel Campground in the bottom of the canyon; another half mile or so to Phantom Ranch.  The trail follows Cedar Ridge, passing around O'Neill Butte, crossing the Tonto East Trail at The Tipoff, finally crossing the Colorado River at Kaibab Bridge.