There isn't a well-documented waterfall named Nemo Falls on Maui, Hawaii. Maui does boast some incredible waterfalls, and here are a couple of possibilities:
Makahiku Falls: Nicknamed "Water that Recognizes No Friend," this powerful 200-foot waterfall tumbles down the Oheo Gulch in Haleakala National Park. Reaching it involves a moderate 0.5-mile hike on the Pipiwai Trail. The lush green surroundings and the mist from the cascading water create a magical atmosphere.
Waimoku Falls: Continuing on the Pipiwai Trail for another 1.5 miles from Makahiku Falls leads you to Waimoku Falls, the tallest waterfall accessible by trail on Maui, clocking in at 400 feet. The trail offers stunning views of the surrounding rainforest.
Perhaps Nemo Falls was a name you heard but got mixed up with one of these beauties? If you have any other details about Nemo Falls, like its location or proximity to certain landmarks, I might be able to help narrow down the search.