Rainbow Falls Park, 40 Rainbow Drive, Hilo
The Rainbow Falls are located on the Wailuku River, the longest river in the state. The park is located within the town of Hilo, so this makes it the most accessible of all the waterfalls on our list. If you only have time for one waterfall on your Big Island adventure, then this is it!
The falls drop 80 feet over a lava cave into the river below. It’s easily seen from the parking lot viewing area (see photo below), or if you’d like to see it up close you can hike to the top of the falls. The hike is less than a mile long.
The best viewing time is early on a sunny morning – this is the best time to see a rainbow!