
The northern entrance to
Petrified Forest National Park, exit 311 of I-70, is 26 miles east of Holbrook and 117 miles from Flagstaff. The south entrance along US 180 is 38 miles from Saint Johns on US 191, and 18 miles southeast of Holbrook.
PDF format map of Petrified Forest National Park, from the National Park Service (204 kb).