Kekaha Kai State Park (Mahaiʻula)

The unpaved access road is rough — drive slowly, yield to oncoming traffic at narrow points, and check conditions before committing in 2WD. The gate closes at sunset; be back to your car before then. No drinking water, no concession, no shade except at the Mahaiʻula coconut grove — bring everything. Reef-safe sunscreen only; Hawaiʻi state law bans oxybenzone and octinoxate, and the offshore reef is what makes the white sand here in the first place. Sea turtles routinely rest along the coastal trail; stay ten feet back, do not touch, do not feed. Pack out everything.