Nf-425 is a hiking, biking, and horse trail in Coconino County, Arizona. It is within Kaibab National Forest. It is 9.3 miles long and begins at 8,417 feet altitude. Traveling the entire trail is 18.6 miles with a total elevation gain of 1,826 feet. The Big Saddle Tank (elevation 7,014 feet) reservoir can be seen along the trail.