Hai Van Pass (Đèo Hải Vân) is one of Vietnam’s most famous mountain roads, being a twisting coastal climb that links the city of Da Nang with Hue. The name is often translated as “ocean cloud pass” because mist regularly rolls in from the sea and can reduce visibility along the ridge.
The pass is roughly 21 km long, crossing a spur of the Annamite Range that juts toward the South China Sea, near Bach Ma National Park. At its highest point, the old road rises to about 496 metres above sea level, which is high enough to bring cooler air, sudden fog, and sweeping panoramic views when the weather is clear.
For many travellers, Hai Van Pass is “the” road trip in central Vietnam, and for a whole generation of visitors, it’s inseparable from the Top Gear Vietnam Special.
Why Hai Van Pass became a global road-trip bucket list item
Hai Van Pass has always been a natural gateway between the north and south in central Vietnam. Historically, it marked a real boundary line between the kingdoms of Dai Viet and Champa for centuries, which is part of why the summit area feels like a threshold: one side opens towards Da Nang’s beaches; the other trends towards Hue’s lagoons and imperial heritage.
Modern fame, though, arrived via motoring culture, thanks in no small part to the Top Gear Vietnam Special (Series 12, 2008), where Jeremy Clarkson described the Hai Van Pass route as “one of the best coast roads in the world.”
That single line travelled a long way, turning a Vietnamese mountain pass into a global “must-drive” clip, shared and reshared for years, and helping place Vietnam on the map for travellers who normally plan their trips around roads rather than resorts.
Top Gear is also what inspired me to take my first step into solo travelling, leading to a butterfly effect where I’m now engaged to a Vietnamese girl and live in Saigon.
When I first saw the episode, solo adventuring was nothing but a pipe dream to a shy 16-year-old boy from the northwest of Ireland. However, after a trip to South Africa with a friend, I built up my courage and set things in order to make my dreams come true.
If you ever travel to Da Nang, Hoi An, or Hue and meet backpackers aged 30+ who’ve rented a bike, it’s almost certain that some of them are there exclusively because of Top Gear.
The Road Today: Pass vs Tunnel
There are effectively two ways through this mountain corridor:
1) The old pass road (the scenic route)
This is the classic ride that climbs, curves around viewpoints, and descends towards Lang Co Bay. It can take longer, and it demands more attention, especially in wet or foggy weather, but this is the road from Top Gear that most people come to see.
2) The Hải Vân Tunnel (the fast route)
To reduce accidents and speed up north–south transport, Vietnam built the Hai Van Tunnel, which opened to traffic on 5 June 2005, cutting the mountain crossing dramatically (often to around 10 minutes) compared with travelling over the pass itself. A second tunnel was later added and opened in 2021, helping to ease congestion and improve safety on the corridor.
If your goal is scenery, you want the pass. If your goal is simply getting from Hue to Da Nang quickly (or you’re travelling in poor conditions), the tunnel exists for a reason.
What You Will Actually See
Hai Van Pass is famous because the scenery changes quickly and dramatically. One moment you’re looking down at the coastline, the next you’re wrapped in cloud with wet greenery close to the road.
Hai Van Quan (the gate at the top)
Near the summit, you’ll find Hai Van Quan, a historic gateway/fortification area that has become the symbolic “you made it” checkpoint. It’s also a natural place to stop, take photos, and look back down the road you just climbed.
Views over Lang Co Bay and the lagoons
On the Hue side, the landscape opens to bays and calm water, with Lang Co often mentioned as a scenic highlight of the region. (Even if you don’t detour all the way down, the viewpoint from above is part of the appeal.)
The railway line hugging the mountains
Another underrated detail: the North–South Railway runs along this coastline too, cutting through a sequence of tunnels. When a train appears, it’s one of those “perfect timing” travel moments – mountain, sea, and a slow curve of carriages below.
When to go: weather matters more than you think
Because the pass is literally named for cloud and mist, timing affects your experience.
Many travel guides recommend the drier months from roughly February to August for clearer skies and safer road conditions, with September–December more associated with rain, reduced visibility, and slippery surfaces.
Even in the “good” months, it’s normal to get pockets of fog at the top while the coastline below is sunny.
If you want the best chance of panoramic views, aim for a morning ride (for visibility and softer light) or late afternoon for golden-hour scenery – but always prioritise safety over the perfect photo.
How to do the trip: practical options
Motorbike (the classic Top Gear-style choice)
This is the version most people dream about: freedom to stop, take photos, and feel the temperature change as you climb. If you do ride, take it seriously as the road has sharp corners, steep gradients, and (in the wet season especially) a risk of slick patches and reduced visibility. The pass was historically considered accident-prone enough that the tunnel was built as a safer bypass.
If you don’t want to motorbike solo, there are Easy Rider tours where you will be driven on the back of a motorbike. You can choose to do either a trip to, across, and back over the pass, or you can book the easy rider tour to take you and your luggage from Hoi An/Da Nang all the way to Hue.
Car or private driver
The car is a comfortable option if you want the views without managing the stress of riding, but there aren’t as many locations to pull into the side of the road to get that perfect picture, and the pass loses some of its charm when sitting inside. However, it does work well if you’re travelling with luggage between Hue and Da Nang/ Hoi An.
Jeep tours
Open-top jeep tours have become popular for the same reason Top Gear worked on TV: open air, big views, easy photo stops. (Just expect it to be more “scenic outing” than “solo adventure”.)
Safety notes
Fog is normal on the pass, so if visibility drops, slow down and keep your line predictable. Hai Van’s mist is part of the identity of the pass and not a rare event. Wet season changes everything for the pass as rain, coupled with the steep corners, increases the risk of sliding. If conditions look rough, there’s no shame in taking the tunnel instead.
Plan your stops. Pull fully off the road at viewpoints and never stop on blind corners for photos. Remember that even some of the locals like to show off and take risks, particularly young teenagers, so often you’ll encounter people driving on your side of the road as they try to overtake slower drivers.
It’s particularly dangerous around bends, as car and lorry drivers are well known for overtaking on corners where they (should) know anyone can be coming around the other side, leading to accidents.
Don’t forget to bring a light layer, as even when Đà Nẵng feels hot, the summit can be cooler and windy, and if the weather does change during your hour-long drive to the pass, it can get cold extremely quickly when it starts to rain.
Why Hai Van Pass is still worth it, even with the tunnel
The tunnel made the route safer and faster for day-to-day travel, but it didn’t replace the pass as an experience. Hai Van Pass is a rare combination: it’s scenic in a “big landscape” way, but it’s also a working road where you see Vietnam moving – commuters, deliveries, riders, and roadside stalls. It feels earned, not staged.
And if you were inspired by Top Gear (like I was), there’s something satisfying about seeing the real place after watching it on screen: the same style of coastline, the same sense of scale, and the realisation that the best part wasn’t the show – it was the road itself.
