Kaumana Caves

Kaumana Caves offers an accessible underground adventure just minutes from Hilo on Hawaii's Big Island. These remarkable lava tube caves were formed by flowing molten rock, creating natural tunnels that extend in two directions from the main entrance. The caves provide an easy introduction to Hawaii's volcanic geology without requiring strenuous hiking or expensive tour fees. Located on the outskirts of Hilo, Kaumana Caves attracts visitors with its convenient drive-to access and completely free admission. The main entrance opens into a skylight chamber where natural light filters down, making it an ideal spot for photos before venturing deeper into the tubes. From here, explorers can choose between two directions – one leads upslope while the other descends further underground. The cave system extends for considerable distances in both directions, though the exact length you can explore depends on your comfort level and preparation. Essential items include a reliable flashlight or headlamp, as the caves become completely dark beyond the entrance chamber. Sturdy shoes with good grip are crucial since the uneven lava rock surfaces can be slippery, especially when wet. While the caves remain cool year-round, making them a refreshing escape from Hawaii Island's tropical heat, visitors should exercise caution on the irregular surfaces. The self-guided nature of this attraction allows you to explore at your own pace, spending anywhere from 30 minutes to several hours depending on how far you venture into these fascinating volcanic formations.