Ask most people to name the tallest waterfall in the United States and you'll hear guesses like Yosemite Falls or Colonial Creek in Washington's North Cascades. Wrong on both counts. The record belongs to Olo'upena Falls on Hawaii's island of Molokai, which plunges 2,953 feet — the highest sheer drop in the country — straight off a cliff face into the Pacific Ocean.
Better still for waterfall chasers: the entire U.S. podium is Hawaiian. Pu'uka'oku Falls, also on Molokai, ranks second at 2,756 feet, and Waihilau Falls on the Big Island takes third at 2,592 feet, hidden in the Waimanu Valley. Colonial Creek, often cited as the mainland champ, sits in fourth place at 2,568 feet. None of them come close to Angel Falls in Venezuela, the world's tallest, but Hawaii's trio is remarkable on its own terms.
What sets Olo'upena apart isn't just the height. The water pours over sea cliffs around 3,000 feet tall — the highest of their kind on the planet. Those same cliffs wall off nearby Kalaupapa, often described as one of the most isolated communities in the world. The drama of the setting is exactly what makes the falls so hard to see.
There are no hiking trails to the base, so overland access is effectively off the table. Your realistic options are a helicopter tour, which gives the best views, or a guided boat trip that takes roughly three hours along the coast. Experienced kayakers sometimes paddle close to the cliff line themselves, but that's a serious undertaking, not a casual paddle. Weather is the wildcard: Molokai's north shore is at its most dramatic during the wet season from November to March, when the falls run fullest, yet those are precisely the days when wind, rain and rough seas most often cancel trips. Even with a booking locked in, you'll need a stroke of luck to get a safe window — and patience to rebook if you don't.
For travellers, that difficulty is part of the appeal. This isn't a roadside photo stop you tick off between brunch and a beach afternoon; it's a half-day expedition that rewards planning and flexibility. Molokai itself suits the mood — it's Hawaii's low-key island, with no resort sprawl, a slow pace, and the kind of raw coastal scenery you can't find on Oahu or Maui. Pair a falls flightseeing trip with a visit to the Kalaupapa overlook for the full effect of those record-breaking cliffs.
If your style of holiday leans toward accessible highlights, stick to the Big Island's Waimanu Valley country or the well-signposted mainland falls. But if you want to stand in a helicopter looking at the tallest waterfall in America — and arguably the most dramatic coastal drop anywhere — Molokai's north shore should be on your list. Just check the marine forecast before you promise anyone a selfie at the bottom.
