Dinh Thoi Loi on Ly Son Island: A Traveler's Guide

What it is

Dinh Thoi Loi is the highest point on Ly Son Island, a small volcanic island about 25 km off the coast of Quang Ngai in central Vietnam (베트남 / 越南 / ベトナム). The peak sits at roughly 170 meters above sea level — not exactly a mountain, but enough elevation to give you a full view of the island's garlic fields, basalt shoreline, and the open sea beyond. The crater at the top is the remnant of a volcano that went quiet thousands of years ago, and the whole landscape has that dark, porous rock texture you'd expect from volcanic terrain.

Ly Son has been inhabited for centuries. The island's economy runs on garlic farming and fishing, and Dinh Thoi Loi has long served as a landmark for boats returning to shore. For travelers, the peak is the geographic anchor of any visit to the island.

Why travelers go

Ly Son itself draws people because it's one of the few genuinely quiet islands left in Vietnam that isn't being turned into a resort complex. Dinh Thoi Loi is the main reason to explore the island's interior rather than just sticking to the coast. From the crater rim, you look down into a shallow, green basin — former farmland inside the old volcanic caldera — and out across the island's patchwork of garlic plots. On clear days, the mainland coast of Quang Ngai is visible to the west.

It's not a hike that requires fitness. The trail from the base takes about 20-30 minutes at a casual pace. What makes it worth doing is the landscape itself: black volcanic rock, frangipani trees, and the wind coming off the sea. It's a good place to sit for a while.

Best time to visit

The dry season from March to September is when Ly Son is most accessible. Seas are calmer, and the speedboat from Sa Ky port runs reliably. June through August are the warmest months — expect full sun and temperatures around 33-35°C, so bring water and a hat for the climb.

The garlic harvest happens around March and April. If you time it right, the fields below Thoi Loi are being worked, and the whole island smells like fresh garlic. It's a specific kind of atmosphere.

Avoid October through February if you can. Rough seas sometimes cancel ferry services for days, and the island gets grey and windswept. Not dangerous, but not ideal for a short visit.

How to get there

From Da Nang, take a bus or train south to Quang Ngai city — about 2-2.5 hours by bus (around 120,000 VND) or 1.5 hours by train (100,000-150,000 VND for a seat). From Quang Ngai, you need to get to Sa Ky port, roughly 20 km east of the city. A taxi runs about 150,000-200,000 VND, or you can take a local bus for around 20,000 VND.

From Sa Ky, speedboats to Ly Son depart in the morning, usually between 7:00 and 8:30 AM. The ride takes about 30-40 minutes and costs around 160,000-200,000 VND one way. Buy tickets a day ahead during summer weekends — boats do sell out.

Once on Ly Son, Dinh Thoi Loi is in the center of the main island (Ly Son Lon). Rent a motorbike at the port for 100,000-150,000 VND per day and ride to the base of the hill. The whole island is only about 10 square km, so nothing is far.

Photo by AN Nhol on Pexels

What to do

Walk the crater rim

The trail leads up to the edge of the old volcanic crater. The caldera floor has been used for farming — mostly garlic and onions — so you get this odd contrast of agricultural green inside a ring of dark volcanic rock. Walk the full rim if you have time; it takes about 40 minutes and gives different angles of the coastline.

Visit Chua Hang (Hang Pagoda)

On the island's western shore, about 3 km from Thoi Loi, a small pagoda sits inside a natural cave formed by lava flows. It's a working place of worship, not a tourist attraction dressed up as one. Remove your shoes, keep your voice down, and take a few minutes inside.

Explore the garlic fields

Ly Son garlic is famous across Vietnam — smaller and more pungent than mainland varieties, grown in sandy volcanic soil. The fields spread out at the base of Thoi Loi, divided by low stone walls. Walk through them in the late afternoon when the light flattens out. Bags of dried garlic make a practical souvenir — around 80,000-120,000 VND for a kilo, depending on the season.

Swim at Cau Cave beach

The rocky cove on the island's east side has clear water and almost no one in it on weekdays. Not a sand beach — you're climbing over volcanic rock to get in — but the water is clean and calm in summer.

Catch sunrise from the peak

If you're staying overnight, ride up to Thoi Loi before 5:30 AM. The island faces east, and the sun comes up over open water. Bring a jacket — mornings are cooler than you'd expect with the sea wind.

Where to eat nearby

Ly Son's signature dish is "goi tom hum" — a lobster salad dressed with garlic, lime, and herbs. It's served at small seafood restaurants along the main road near the port. Expect to pay 250,000-400,000 VND per lobster depending on size and season.

Also worth trying: "toi den" (black garlic), which locals slow-ferment from their harvest. It's sweet and sticky, nothing like raw garlic, and you can buy jars at most shops. For a proper meal, look for "com ga" — chicken rice with Ly Son garlic oil — at the family-run places near the market. Around 40,000-60,000 VND a plate.

Back on the mainland in Quang Ngai city, don't skip "com ga Quang Ngai," the local version of chicken rice that's distinct from Hoi An's. The rice is cooked in turmeric chicken broth, and the portions are generous. A plate runs about 35,000-50,000 VND at places along Quang Trung street.

Where to stay

Ly Son has no resorts and that's part of the appeal. Accommodation is mostly guesthouses and homestays.

• Budget: Homestays near the port run 150,000-300,000 VND per night. Basic rooms, fan or AC, clean enough. Families often cook dinner for guests if you ask.
• Mid-range: A few newer mini-hotels have opened, with AC rooms, hot water, and sea views for 400,000-600,000 VND.
• Top end: There isn't one. If you need a pool and a lobby, Ly Son isn't the island for you.

Photo by AN Nhol on Pexels

Practical tips locals would tell you

• Bring cash. There's one ATM on Ly Son and it runs out of money on busy weekends. Cards are not widely accepted.
• Sunscreen and water are more expensive on the island — buy them in Quang Ngai city before you board the boat.
• If you rent a motorbike, check the brakes before you ride. Some rental bikes are in rough shape.
• The island has a second, smaller landmass called Ly Son Nho (An Binh island), reachable by a short boat ride. Worth a half-day if you have time — fewer visitors, quieter beaches.
• Plastic bags of garlic sold at the port are often marked up for tourists. Buy from the market or directly from farms for better prices.

Common mistakes to avoid

• Not booking the ferry ahead on weekends: Summer Saturdays sell out. Book the day before at the port or through your guesthouse.
• Trying to do Ly Son as a day trip: Technically possible, but the early boat schedule and limited return departures make it rushed. One night is the minimum to actually enjoy it.
• Skipping the interior for the coast: Most visitors stick to the shoreline. Thoi Loi and the garlic fields are what make Ly Son different from any other Vietnamese island.
• Wearing flip-flops on the Thoi Loi trail: The volcanic rock is uneven and sharp in places. Closed shoes make the walk much more comfortable.

Practical notes

Ly Son is still a working island, not a tourist zone. That means limited infrastructure but also an atmosphere that places like Phu Quoc lost years ago. Dinh Thoi Loi is the geographic and visual heart of the island — plan around it, and the rest of the trip falls into place.