Ariel-Foundation Park is officially open April 1 through November 15. Some areas of the park are accessible to pedestrians year-round. Daily hours of operation are 7 a.m. to 11 p.m. There are no admissions or parking fees. The Rastin Observation Tower, park museum, picnic pavillions, trails and other park features are free and open to the public. The Rastin Observation Tower is closed during winter months.