Pololu Valley Professional Review and Guide
"This is the northernmost of the deep narrow valleys carved into Hawaii’s windward Kohala coast, at one time home to a farming community of native Hawaiians but long since abandoned. It’s mostly ranching country now, and the wider inland part of the valley is private property, blocked by a fence behind which cattle graze. Please keep out.
Your reward for negotiating the steep, rocky, sometimes slippery trail is a pretty black sand beach shaded by ironwoods. It is popular with locals, some of whom camp among the trees though camping is officially illegal. The ocean currents are too dangerous for swimming. Pololu is a less-crowded alternative to Waipio Valley, which is not very far away to the south as the crow flies but is separated by a roadless area of the coast. To hike both, you have to drive all the way back to Waimea, across the Kohala peninsula, then up the opposite side"