The incident occurred on February 9 at the entrance to the Ten-X Campground of the Kaibab National Forest, according to a report posted today by Williams News of Williams, AZ.
The facility is located two miles south of Tusayan, AZ on the east side of Highway 64.
The article did not indicate if the guard had been installed by our stewards of the public lands.
The Western Watersheds map indicates that the campground is surrounded by the Anita Allotment of the Tusayan Ranger District.
The mishap follows two other calls in the past year involving horses in cattle guards.
UPDATE: More information about the allotment can be found in the 2022 Annual Operating Instructions.