Complex sentence: The Endor scenes in "Return of the Jedi" were filmed in a redwood forest at Jedediah Smith Redwoods State Park near Crescent City, California and in the Redwood grove near the Skywalker Ranch in Marin County California.
Split into simpler sentences: The Endor scenes in "Return of the Jedi" were filmed in two Northern California locations. A redwood forest at Jedediah Smith Redwoods State Park near Crescent City, California and in the Redwood grove near the Skywalker Ranch in Marin County California.