What are the best day trips from Maui?

Haleakalā over the Road to Hana as a couples' first pick. The summit sits at 10,023 feet, 36 miles from Kahului, and sunrise reservations through recreation.gov cost $1.50 per car on top of the $30 park entrance fee. You'll need to leave your hotel by 2:30am to reach the summit before gates close around 5:45am. The air drops to 40°F up there even in September, and you'll both be shivering in rental blankets, watching light fill the crater floor while 150 other cars sit in the lot behind you. The national park, established in 1961, spans a 7-mile-wide crater that you can hike into on the Sliding Sands Trail, 4 miles to the crater floor with 1,400 feet of elevation loss. If one of you hates early mornings, the sunset visit skips the reservation entirely and the lot is half-empty by 4pm.

The Road to Hana runs 52 miles east from Kahului along Highway 360, through 620 curves and across 59 bridges, 46 of them single-lane. One partner drives while the other navigates, and this arrangement tends to work for about 90 minutes before someone suggests turning around. That said, the reward is real if you pick 3 stops instead of 12. Wai'ānapanapa State Park, 2 miles before Hana town, has a black volcanic sand beach where the waves hit hard enough to send spray 30 feet up the rocks. Parking reservations run $10 per car through the Hawaii DLNR site and fill 2 weeks ahead. Kahanu Garden, founded in 1972, sits a mile past the park and holds the Pi'ilanihale Heiau, an ancient Hawaiian temple platform covering nearly an acre. On the return, the backside route via Piilani Highway (Highway 31) cuts through ranch land and dry lava fields, saving you 2 hours. Check your rental contract first.

Molokini Crater sits 3 miles off Maui's south shore, and morning snorkeling trips leave Ma'alaea Harbor between 6:30am and 7:30am daily. Expect $150–250 per person for a 5-hour trip with operators like Pacific Whale Foundation or Trilogy Excursions, breakfast and lunch included on most boats. The crater's crescent shape blocks the south swell, so the water inside stays calm enough to see 150 feet down on a clear morning. Afternoon trips exist but the trade winds pick up around 11am and cut visibility by half, so take the morning departure. For a different kind of day on the water, the Expeditions Ferry runs from Lahaina Harbor to Manele Bay on Lāna'i, 9 miles across the Auau Channel. The crossing takes 45 minutes and costs $30 each way per adult, with 5 departures daily. Lāna'i has no traffic lights and a population of about 3,200. Hulopoe Beach at Manele Bay has tide pools along its south edge and a Four Seasons resort to the north. The sand stays groomed, but on a weekday morning you might find 50 feet of shoreline to yourselves.

Upcountry Maui around Kula sits at 3,000 feet, 25 miles from Kahului, and the air runs 10–15°F cooler than the coast. Ali'i Kula Lavender Farm charges $6 per person and smells like Provence with plumeria mixed in. MauiWine at 'Ulupalakua Ranch, 5 miles further uphill at 1,800 feet, pours a pineapple wine that sounds wrong but pairs well with their cheese plate at $15–20 per tasting flight. The Holy Ghost Catholic Church on Lower Kula Road, built by Portuguese settlers in the 1890s, has an octagonal shape you won't see elsewhere on the island. One of you can do a guided Haleakalā bike descent for $150, meeting at the summit at 6:30am for a 23-mile coast down to Paia, while the other starts the morning at the lavender farm around 9. Meet for dinner in Paia by 6pm. Flatbread Company on Hana Highway does wood-fired kalua pork pizza, and the lanai tables fill by 7pm.