Three popular television documentaries about Glacier National Park will be broadcast on MontanaPBS in May.

• “Before There Were Parks: Yellowstone and Glacier Through Native Eyes” will air Thursday, May 1 at 8:30 p.m., Monday, May 5, at 5:30 a.m. and Sunday, May 11, at 10:30 a.m.

For more than 12,000 years, the intermountain West’s native peoples have called the lands known today as Yellowstone and Glacier national parks “home.”

This program explores modern indigenous perspectives on these great wilderness areas and explores both the cultural divide that separates modern times from the not-so-distant past and recent efforts by the National Park Service and native peoples to bring these disparate visions into greater harmony.

• “Glacier Park’s Night of the Grizzlies” will air Thursday, May1, at 7 p.m. and Monday, May 5, at 4 a.m. The documentary tells the tale of an unforgettable night of crisis, intense fear, bravery and, ultimately, grief.

On the night of Aug. 12, 1967, grizzly bears in Glacier Park killed two young women and severely mauled one man. Archival material, photographs, re-creations and gripping on-camera interviews with survivors, witnesses, family members, journalists and biologists, provide a complete account of those events.

• “Glacier Park Remembered” will air Sunday, May 4, at 10 a.m. and  Thursday, May 22, at 7 p.m. Travel in time through rare, restored film, museum pictures and historical memorabilia.

See how eastern city slickers were lured to north-central Montana by a glitzy promotional campaign promoted by the Great Northern Railroad. It is hard to imagine what was more memorable in Glacier Park a century ago — the breath-taking scenery or the adventure.

For more information, visit online at www.montanapbs.org.