Carlsmith Beach Park, known locally as Four Mile, is a coastal park on Kalanianaole Street in Hilo. Its grassy lawn and lava-rock shoreline lead to sheltered pools with clear water and sandy patches underfoot. Swim or snorkel among fish and small coral reefs, and you may spot green sea turtles in the lagoon. There is no conventional sandy beach, but the lawn, picnic tables and calm water make this a good place to pause by the coast. Water temperature can vary where cool springs enter the pools.
A grassy shore and protected pools
Carlsmith is different from a typical sandy beach. The park has a grassy lawn where you can spread out, while flat lava rock and vegetation edge the water. Rock walls shelter the swimming areas from open-ocean waves, creating pools suited to a dip or a slow snorkel.
The bottom is sandy in places, even though the shoreline itself is rocky. Small access points lead into the water, including metal steps. The water is shallow in some areas, and there are spots where children can wade. The lawn and picnic tables give you a place to rest between swims.
Cool springs and marine life
Groundwater flows up through parts of the lagoon floor, so the water can feel cooler in some patches than in others. The pools also connect with the ocean through channels in the lava. The mix of fresh and salt water can affect visibility, but clear conditions reveal fish and small coral reefs.
Green sea turtles sometimes swim or rest in the lagoon. They are protected wildlife: keep at least 10 feet away and never touch them. Bring snorkel gear if you want to look beneath the surface, and water shoes can help on the rough volcanic rocks around the entry areas.
Planning a stop
The park is at 1815 Kalanianaole Street in Hilo. It has restrooms, picnic tables and free parking. The grassy setting works well for a break between swims, though anyone expecting a broad sandy beach should plan for a rocky shoreline instead.
For calmer water, remain within the rock walls. If you want more room to settle in, choose a weekday or a quieter time. Conditions and water temperature can differ across the lagoon, so take care as you enter and move between pools.
FAQ
Is Carlsmith Beach Park sandy?
The shore is rocky and there is no conventional sandy beach. The park has a grassy lawn, and parts of the lagoon bottom are sandy.
Can you snorkel at Carlsmith Beach Park?
Yes. The sheltered pools have clear water, fish and small coral reefs. Bring your own snorkel gear.
Are there sea turtles at Carlsmith Beach Park?
Green sea turtles sometimes visit the lagoon. Keep at least 10 feet away and do not touch them.
Does Carlsmith Beach Park have parking and restrooms?
The park has free parking and public restrooms.
