Hawaii Island Beach Guide

Road to the Sea Beach

Road to the Sea Beach is a remote Ka'u shoreline reached by a rough lava road, with black and green sand, open ocean views and a wild south island feel.

Plan Your Visit

Road to the Sea Black Sand Beach, Big Island

The Road to the Sea, located on the Big Island's southwestern coast, is one that's hardly traveled, and it's easy to see why. The six-mile (9.7 km) trail is dotted with sharp lava rocks, surrounded by steep ledges and riddled with cracks and potholes. But those who make it here are well-rewarded, for at the end of this path lie a few black and green sand beaches that are surrounded by nothing but black lava rocks. On a sunny day, the coast has a striking look with its greenish sand, deep blue water and surrounding black cliffs.

But getting here is definitely an adventure in itself. The first 3 miles (4.8 km) of the road are doable even in a regular car, but after that the road is rough and steep in places, so a four-wheel drive vehicle is necessary to navigate it (or you can park here and hike the final 3 miles to the beach).

It's commonly called the Road to the Sea Black Sand Beach, but there are actually two beaches at the end of the road. Neither has an official name, but both are known for their black and green sands. The green comes from crushed olivine crystals, a less-polished variety of peridot. It is a semi-precious gemstone, brought to the surface by past volcanic activity and the erosive force of the ocean. The ancient Hawaiians considered olivine (green sand) to be the tears of the volcano goddess Pele, and they used the green sand in healing ceremonies. The sand pieces are too small to be considered gemstones, but occasionally a lucky beachgoer finds a bigger piece.

The two beaches are fairly small, between 50 and 100 feet (15-30 m) long. The green sand has a slightly darker hue here than at Papakolea Beach (near South Point), which is the most popular green-sand beach on the Big Island. There are no lifeguards in this area, so if you want to swim, snorkel or surf, keep in mind that the ocean bottom drops off quickly and strong currents can be present, especially during times of high surf. Fishing is a popular activity here, especially in the spring and summer when the fish swim closer to shore. The main catch is ulua.

Key Features

Remote Ka'u shoreline reached by a rough lava road from Highway 11
Black and green sand beaches sit at the end of the long coastal route
Green grains come from olivine crystals mixed with dark volcanic sand
The road is rocky, uneven and slow, especially beyond the easier first stretch
A high-clearance 4WD vehicle is the safer choice for reaching the shoreline
No services, shade structures or lifeguards are available at the beach
The ocean can drop off quickly and currents may be strong near shore
Open lava fields and ocean views give the area a very remote south island feel
Extra water, food, sun protection and emergency supplies matter here
Daylight timing is important because the drive out is slow and rough

Frequently Asked Questions

How long should I allow for Road to the Sea Beach?

Allow several hours for the full visit, since the road is slow, rough and remote. Leave plenty of daylight for both directions.

Do I need a 4WD vehicle for Road to the Sea Beach?

A high-clearance 4WD vehicle is strongly recommended beyond the easier first stretch. Regular rental cars can be damaged by the rough lava road.

What should I bring for Road to the Sea Beach?

Bring drinking water, food, sunscreen, a hat, a charged phone, shoes for rough lava and emergency supplies. There are no services at the shoreline.

Why is the sand green in places?

The green color comes from olivine crystals mixed with dark volcanic sand, a natural result of Hawaii Island's lava and ocean erosion.

What should I know before entering the water?

The ocean bottom can drop off quickly, and currents may be strong. If the water looks rough or the wind is up, stay on land and enjoy the shoreline views.