The Mokulua Islands rise 206 and 62 feet from the Pacific, two volcanic remnants formed 2.6 million years ago when the Ko'olau shield erupted along Oahu's windward spine. Moku Nui, the larger islet, shelters the only legal landing beach within the Hawaii State Seabird Sanctuary, a 23-acre preserve established in 1988 to protect wedge-tailed shearwaters, brown boobies, and red-footed boobies that nest in the scrub vegetation each spring. Moku Iki, the smaller twin, remains entirely off-limits to protect nesting colonies year-round. The conservation fee—3 dollars per person per day—funds habitat restoration and predator monitoring conducted by the Division of Forestry and Wildlife. Kayakers launch from Kailua Beach Park, crossing a mile of reef-protected water that holds visibility above 60 feet on calm mornings. The channel between the islets funnels northeast trade winds into gusts that can exceed 20 knots by midday, making early departure critical. Coral heads scattered across the offshore shelf host green sea turtles, yellowfin surgeonfish, and occasional Hawaiian monk seals that haul onto the rocks below Moku Nui's eastern bluff. The landing beach, a 40-foot crescent of coarse coral sand on the southwest shore, accommodates fewer than 30 visitors at a time, enforcing an effective daily cap through permit allocation. Moku Nui's interior consists of a single hiking trail—unmarked, 0.3 miles—that climbs 140 feet to a ridgeline overlook facing Lanikai. The path crosses nesting burrows from April through October; during these months, the Division of Forestry and Wildlife restricts access to the shoreline zone only. Native 'ilima and naupaka shrubs anchor the volcanic soil, while invasive fountain grass requires annual removal. From the summit, the view extends 12 miles south to Koko Head and 9 miles west across Kailua Bay to the Pali cliffs. Guided mokulua islands tour tours incorporate snorkel stops along the reef shelf, where depth ranges from 8 to 25 feet and the substrate shifts from rubble to patch reef. Self-guided kayak rentals require basic ocean skills—ability to paddle in chop, recognition of wind direction shifts, and competence re-entering a sit-on-top kayak after capsize. No lifeguard patrols the offshore route. The State of Hawaii prohibits drone flights, fishing, and camping within the sanctuary boundary, which extends 500 feet from each island's mean high-water line.