Big Bend National Park is open all day, every day, all year. . However, entrance stations are only staffed during normal business hours, and sometimes not even all of those. When the entrance stations are closed, visitors may enter the park and travel to their final destination for the day. Visitors are requested to then stop at the park headquarters and visitor center at Panther Junction at earliset convenience to pay fees and obtain a park pass. Visitor center hours are 8:00am to 6:00pm daily.