The Zane Grey Highline Trail 50 mile Endurance Run , known Know commonly as the Zane Grey 50 , is a 50-mile ( 80 km ) ultramarathon that takes place Process_start on the Highline Trail in the Tonto National Forest just below the Mogollon Rim in central Arizona .

The Zane Grey Highline Trail 50 mile Endurance Run , known Know commonly as the Zane Grey 50 , is a 50-mile ( 80 km ) ultramarathon that takes place Process_start on the Highline Trail in the Tonto National Forest just below the Mogollon Rim in central Arizona .