Ahalanui Park

Ahalanui Park was a former Puna Coast warm pond, remembered for volcanically heated spring water, palms, picnic lawns and old shoreline memories before the 2018 lava flow.

Ahalanui Beach Park, Big Island

Editor's Note: Due to a lava flow that occurred on June 5, 2018, this beautiful destination was unfortunately destroyed. We are leaving this page up for all of us who have made memories here and would like to remember it as it used to be.

Located on the Big Island’s east shore near Pahoa, Ahalanui Park (also known as Pualaa County Park) offers a bathing experience that is unique in the Hawaiian Islands. Here you can have a bath in a spring-fed, walled-in pool, which is volcanically heated to a comfortable 90°F (32°C). On some days though the water is a bit cooler than that.

The part natural part man-made pool is located right next to the ocean. It is connected to it by a small inlet, which also allows small tropical fish to enter the pool. The pool water is brackish, but clear, and the bottom of the pool is a combination of sand and mud, with a slight sulfur smell.

Ahalanui Park is a good place for novice swimmers since the water is shallow and there is even a lifeguard. A few access ladders make getting into the pool easy. It is a beautiful spot, surrounded by palm trees, grass and shady areas, ideal for picnics.

Note: Avoid swimming at Ahalanui Pond with an open wound or cut. The pond was closed to the public on September 26, 2013, after a man contracted an infection after swimming in the pond with an open wound. The County reopened Ahalanui Park in early October after water testing by the state Department of Health showed bacterial levels safe for swimming. According to the Health Department, there was no evidence to suggest the pond water being contaminated. The Hawaii Department of Health recommends keeping open wounds clean, dry and covered to prevent infection, which can come from anywhere, including from bacteria that live naturally on the human body.

The 2018 eruption changed this section of the Puna coastline. Related background is available on our Hawaii natural disasters page.

Key Features

Former Puna Coast warm pond
Also known as Pualaa County Park
Covered by the June 5, 2018 lava flow
Kept as a historical reference page
Former pond was spring-fed and ocean-connected
Geothermal heat warmed the brackish water
Water was once about 90 degrees F on many days
Palm trees, grass and shade surrounded the pond
Former park was remembered for family beach days and picnics
Visitors should choose current open shoreline areas instead

Frequently Asked Questions

Why is this page still online?

The page remains as a historical reference for a Puna Coast place many residents and visitors remember from before the 2018 lava flow.

What changed in 2018?

The lower Puna eruption covered the former warm pond, park grounds and surrounding shoreline with lava, removing Ahalanui as a visitor destination.

What was the pond like before the lava flow?

The former pond was spring-fed, brackish and ocean-connected, with warm water, a sandy-muddy bottom and tropical fish sometimes entering through the inlet.

Why was the water warm?

Geothermal heat warmed the spring-fed water, giving the pond its well-known bath-like feel before the shoreline was changed by lava.

Where should visitors go now?

Choose current open shoreline parks in Puna or Hilo, and check present conditions because roads, lava landscapes and ocean areas can change.