Rainbow Falls, Waterfall in Cascade Mountains, Washington.

Rainbow Falls is a waterfall on Rainbow Creek in the Lake Chelan National Recreation Area, within North Cascades National Park near Stehekin, Washington. Its water drops 392 feet (119.5 m) in two tiers; the upper tier falls 312 feet (95.1 m) into a basin between the two steps.

Rainbow Falls lies within the Lake Chelan National Recreation Area, part of North Cascades National Park, near Stehekin. The National Park Service maintains the trails that give access to the falls, and in summer it runs a shuttle from the Stehekin dock to the site. The falls drop 392 feet in two tiers, the upper one 312 feet, with a basin between them.

The name Rainbow Falls refers to the rainbows that form in the spray of the 392-foot cascade, a sight tied to the falls' setting in the Lake Chelan National Recreation Area near Stehekin. Visitors reach it by National Park Service trails and, in summer, by a park shuttle from the Stehekin dock.

Rainbow Falls is reached by trails maintained by the National Park Service and is easily seen from Stehekin Valley Road. In summer a park shuttle runs regularly from the Stehekin dock to the falls. The water drops in two tiers, the upper one 312 feet to a basin.

The falling water creates a natural mist in morning hours that produces continuous rainbows when sunlight hits it at the right angle. This optical effect occurs only when the sun is low in the sky and strikes the water vapor directly.