Circle Island Oahu

Start early with the Diamond Head hike before the heat and crowds arrive. The 1.6-mile summit trail takes 60–90 minutes round-trip and rewards you with views of Waikiki and the Pacific. This is the only stop worth doing before you hit the road — all others can be drive-by or short hikes.

If you have a Hanauma Bay reservation, this is a natural first stop (requires 3–4 hours, which reshapes your circle island timing). If not, the overlook parking area offers a stunning view of the bay from above — worth a 10-minute stop. From Waikiki, take Kalanianaole Highway east past Koko Crater.

The southeastern tip of Oahu where the south shore gives way to the dramatic Windward Coast cliffs. The Makapu'u Lighthouse Trail (2 miles round-trip) offers stunning views of Rabbit Island, the Windward Coast, and — in winter — migrating humpback whales offshore. Even a 20-minute walk to the lower viewpoint is worth it.

Turn north at Waimanalo and head to Kailua — one of the most beautiful towns in Hawaii. Kailua Beach and adjacent Lanikai Beach are among the finest beaches on the island: powdery white sand, turquoise water, and the Mokulua Islands offshore. Have lunch in Kailua town (Cinnamon's Restaurant for breakfast/brunch, Kalapawai Café for lunch).

A stunning 400-acre botanical garden in the Ko'olau Mountains above Kaneohe, with dramatic mountain backdrops and a serene lake. Free admission. The 'misty mountains' view from inside the garden — especially in the late afternoon when clouds settle on the peaks — is one of the most photogenic scenes on Oahu.

A distinctive cone-shaped island just offshore in Kaneohe Bay that looks exactly like its nickname. Pull over at the small roadside park on Kamehameha Highway for photos. At low tide, you can wade out to the island — but check the tide schedule and be aware of the current.

As you continue north on Kamehameha Highway, the landscape opens into agricultural fields — Kahuku is known for its garlic shrimp farms. Giovanni's Shrimp Truck near Kahuku is legendary. The drive itself through the rural north is one of the most beautiful on the island — slow down and enjoy it.

The famous stretch of North Shore beach between Sunset Beach and Ehukai Beach Park (Pipeline). In winter (November–February), the waves here are the largest in the world — 20–30 foot faces on big days. In summer, the water is calm and swimmable. Walking the beach between Sunset and Pipeline is free, flat, and spectacular at any time of year.

The historic surf town at the western entrance to the North Shore is the best stop of the day. Browse the surf shops, grab shave ice at Matsumoto Shave Ice or Aoki's (lines move fast), walk the bridge over the Anahulu River, and watch the sunset. Haleiwa has excellent restaurants — Kono's Haleiwa, Beet Box Café, and Haleiwa Joe's for dinner.