Bac Sum Pass is one of the first mountain passes you’ll ride on the Ha Giang Loop, often seen as the opening challenge on the way to the Dong Van Karst Plateau.
With a 7 kilometer uphill climb and steady winding curves, the pass leads you toward Quan Ba Heaven Gate. It gently tests your riding skills while rewarding you with fresh mountain air and beautiful views along the way.
Bac Sum Pass tests your riding skills while offering beautiful scenery that’s worth slowing down to enjoy.
With over 8 years of experience guiding Ha Giang Loop tours, Lila Tour & Inn will help you dive deeper into the stories behind this pass: its location, history, sceneries, and travel tips.
Let’s get started!
Overview of Bac Sum Pass
Bac Sum Pass, also known as Bac Sum Slope, lies along National Highway 4C, stretching from Minh Tan Commune (Vi Xuyen District) to Quyet Tien Commune (Quan Ba District).
Located about 50 km northeast of Ha Giang City, it marks the first major challenge for anyone embarking on the Ha Giang Loop.
For riders on the Ha Giang Loop, Bac Sum Pass is the longest and steepest climb, rising about 450 meters over a 7 km uphill stretch.
Along the road, you will face many sharp bends and tight hairpin turns that test your control and confidence. But once you conquer Bac Sum Pass, the reward is a strong sense of achievement and stunning mountain views in every direction.
At around 1,400 meters above sea level, the pass opens up to wide panoramas of Ha Giang’s highlands, with clouds drifting over limestone peaks and layers of green hills stretching far into the distance.
At the top, you can stop at the “Check in Bac Sum Pass” rest area. It is a great place to relax, try local snacks, and take photos at several scenic check-in spots.
Bac Sum Pass also carries historical meaning. On old French maps, it was called Pac Xum, which means “a hundred caves and hollows” in the Tay and Hmong languages, a name that reflects its rugged landscape of cliffs and deep valleys.
During the resistance war against the French, this pass played an important role as a communication route for Vietnamese soldiers. Today, Bac Sum Pass symbolizes the connection between the lowlands and the ethnic highlands of northern Ha Giang, helping bring people, culture, and trade closer together.
Explore
Ma Pi Leng Pass Ha Giang , one of Vietnam’s Four Great Mountain Passes and the most breathtaking highlight of the Ha Giang Loop. 
Best time to do Bac Sum Pass
From our local experience, the best time to explore the Bac Sum pass is from September to April, which is Ha Giang’s dry season.
During these months, the weather is generally pleasant, with average daytime temperatures ranging from 15°C to 25°C. Days are often sunny and clear, while mornings and evenings can be cool, making travel on the pass easier and safer.
This period also brings out the most beautiful scenery around Bac Sum Pass.
- From September to October, golden rice terraces shine under the sun, followed by the pink and purple bloom of buckwheat flowers in November.
- By March and April, peach and plum blossoms gently cover the highlands, painting the valleys with a dreamy, romantic charm.
Otherwise, July to August marks the peak of the rainy season in Ha Giang. Usually, it rains at night and clears up during the day. So, if you want to conquer the pass, make sure you’re well-prepared.
While checking the weather at Bac Sum Pass, it’s also a good idea to look into Ha Giang’s weather patterns throughout the year to better prepare for a smooth and enjoyable trip. See our full guide on the best time to visit Ha Giang loop.
How to get to Bac Sum Pass?
First, you’ll need to get to Ha Giang City.
Most travelers coming from other provinces, especially those joining a Ha Giang Loop tour from Hanoi, choose an overnight sleeper bus for convenience and comfort.
No matter where you start, Lila Tour & Inn can help arrange a bus ticket to Ha Giang City and advise you on the best departure points and routes.
Secondly, from Ha Giang City to Bac Sum Pass.
There are two main ways to travel, depending on how you want to experience the Ha Giang Loop.
- Join a guided tour: Ride as a passenger with an Easy Rider, a skilled local driver who handles the mountain roads for you. If you want more freedom, you can ride your own motorbike while following a local guide (an IDP is required). For families or small groups, a private car tour is a comfortable and relaxed choice.
- Rent a motorbike: This option is best for confident riders with an IDP who want full independence on the road.
No matter how you travel, having a clear overview of the route will make your journey smoother and more enjoyable. We recommend checking our Ha Giang Loop map to understand the full journey and plan your adventure with confidence.
Top things to do on your journey to Bac Sum Pass
At Lila, we always suggest slowing down and enjoying Bac Sum Pass beyond just riding through it. This stretch of road is full of beautiful views and small moments that make the Ha Giang Loop special.
1. Enjoy the view and take photos
As you climb higher, the scenery becomes more magical. Soft clouds drift over green hills, and lush mountains line both sides of the road. From the top of the pass, you can see the winding road below, gently wrapping around the mountains like a ribbon.
Near one of the upper bends, there is a wide open spot where you can safely stop. It is a great place to park, enjoy a warm coffee, and simply take in the peaceful mountain views before continuing your journey.
In autumn, the mountains glow with golden rice terraces stretching across the hillsides. By early winter, soft pink buckwheat flowers bloom in the valleys, giving the landscape a gentle, dreamlike beauty.
As you ride downhill, you will pass small earthen houses, a classic feature of H’Mong villages. Their simple design and quiet surroundings add a sense of warmth and calm to this remote highland area.
2. Hunting the clouds
Cloud hunting is one of the most memorable experiences at Bac Sum Pass. The best time to go is before 6:00 AM, when the first sunlight breaks through the thick layers of mist. From the top of the pass, it feels like standing above a sea of clouds, watching them slowly roll across the valleys below. It’s a quiet, magical moment that makes the early wake-up completely worth it.
3. Visit a local market
Before reaching Bac Sum Pass, stop by Quyet Tien Market, about 10 km away. Held every Saturday morning, this lively market gathers H’Mong, Dao, and Tay villagers from the surrounding areas. It is more than a place to shop. Locals come here to meet friends, chat, and share daily life. Walking through the market is a great way to experience real highland culture and pick up small local souvenirs before continuing your ride.
4. Taste the local food
On the way to Bac Sum Pass, take time to enjoy the local food around Quyet Tien Commune, a favorite stop for both travelers and locals. The area is famous for Trang Kim rice noodles, a simple but tasty dish served with pork, fresh herbs, and a light broth.
Nearby small eateries also offer corn wine, smoked buffalo meat, and buckwheat cakes, giving you a true taste of highland cuisine.
Nearby attractions: Extended journey beyond Bac Sum Pass
If you’re a traveler who loves exploring, don’t stop at Bac Sum Pass just yet. Around this scenic route lie many fascinating spots waiting to be discovered.
Tham Luong Cave
Hang Tham Luong is a hidden cave about 25 km from Ha Giang City and just 7,8 km from Bac Sum Pass, making it a convenient stop on the Ha Giang Loop. From the parking area, it takes only about 15 minutes to walk through a quiet primary forest filled with ancient trees before reaching the cave entrance.
Inside, you will find a wide arched opening and a beautiful system of stalactites and stalagmites in many shapes and sizes. Soft lighting reveals narrow paths and tall stone columns, creating a mysterious and almost magical atmosphere. It is a peaceful place to slow down, explore nature, and add a different experience to your mountain journey.
Quan Ba Heaven Gate
After conquering Bac Sum Pass, you’ll ride about 14 km to reach Quan Ba Heaven Gate, the first gateway to the Dong Van Karst Plateau. From this scenic viewpoint, you can enjoy sweeping views of Tam Son Town, surrounded by green valleys, winding roads, and dramatic limestone mountains. Heaven’s Gate ha giang is an ideal stop to grab a coffee, take photos, and pause for a moment in the cool, fresh mountain air before continuing your journey.
Twin Mountains (Fairy Bosom)
Just 3.5 km from Heaven Gate, the Twin Mountains are the most iconic symbol of Quan Ba. Two perfectly rounded limestone hills rise side by side in the middle of a wide valley, creating a scene that feels almost unreal.
Surrounded by rice fields, quiet villages, and towering karst peaks, the Twin Mountains are one of the most photographed stops on the Ha Giang Loop and often where travelers first fall in love with Ha Giang.
Thach Son Than (The Stone God Valley)
Thach Son Than Valley is about 9 km from Bac Sum Pass and lies within the Dong Van Karst Plateau Geopark, a UNESCO Global Geopark. It is famous for seven ancient stone pillars standing among mountains, valleys, and winding roads, marking the entrance to Ha Giang’s rocky highlands.
From late autumn to early winter, the valley is covered with buckwheat flowers in soft pink and purple colors. With misty hills and wide open views, it is a calm and beautiful stop near Bac Sum Pass, perfect for photos and a short break.
Explore
Tham Ma Pass , the famous “horse-testing” road on the Ha Giang Loop.
Where to stay near Bac Sum Pass?
If you want a convenient place to stay near Bac Sum Pass, the best choice is Quan Ba, especially the peaceful Nam Dam Village. This area has many homestays and small hotels close to the pass. Since it is right on the Ha Giang Loop route, it is an ideal stop for all travelers.
Here are Lila’s top 5 homestay recommendations:
Cong Troi Homestay (Heaven Gate Homestay)
Located on the main road to Heaven Gate, Cong Troi homestay offers rooms with views of the valley or garden. Most rooms are doubles and come with simple but cozy comforts.
The average price starts from 400,000 VND to 500,000 VND per night.
Mun Homestay & Bungalow
Mun Homestay & Bungalow offers a warm, rustic stay with private rooms, shared rooms, and a peaceful backyard farm area. Guests often recommend it for its friendly hosts, home-style dinners, and authentic local atmosphere.
Prices typically range from 125,000VND – 690,000VND per night.
Ly Danh Homestay & Bunglalow
Ly Danh Homestay offers cozy wooden bungalows with a peaceful mountain feel. Rooms have private bathrooms, free wifi, and garden or balcony views. Guests also enjoy the friendly hosts, the quiet garden space, and the BBQ area, perfect for relaxing after a day of exploring.
Prices typically range from 600,000 to 800,000 VND per night.
Ly Ta Quan Homestay
Ly Ta Quan Homestay has simple, comfy double rooms with garden views, free wifi, and private bathrooms. It’s easy to reach and great for a quiet, restful stay. Travelers often mention the peaceful setting and the warm, homey feeling from the hosts.
The average price is around 495,000 VND per night.
Don Dao Homestay & Bungalow
This homestay offers simple, welcoming rooms in a quiet village setting, with options from private bungalows to family rooms, many with mountain or garden views. Guests love the warm family atmosphere, tasty home cooked meals, and the peaceful, relaxing vibe.
The average price is around 735,000 – 1,100,000 VND per night.
Note: Prices for each homestay are updated based on Booking.com as of December 2025
Experience of exploring Bac Sum Pass
To make your trip to Bac Sum Pass safer, smoother, and more enjoyable, Lila has gathered a few practical tips based on our 8 years of experience guiding tours on the Ha Giang Loop.
- Check the weather in advance: Roads can be slippery during the rainy season (July-August), so plan and pack carefully based on the weather forecast.
- Don’t overpack: Only bring essentials; keep your bag light and smartly packed, following our Ha Giang Loop Packing Guide.
- Dress in layers: The weather can change quickly at Heaven’s Gate, from warm sunshine to chilly winds. Layering helps you stay comfortable in any condition.
- Start early each day: Riding after sunset is risky due to poor visibility, winding mountain roads, and the lack of streetlights.
- Always wear protective gear: A proper helmet, long sleeves, and sturdy shoes help protect you from the sun, wind, and unexpected road conditions.
- Download offline maps: As phone signal can be weak in many areas, we recommend downloading apps like Maps.me or Google Maps (offline mode) to help with navigation.
- Carry enough cash: There are no ATMs in smaller towns like rural villages, and some places don’t accept cards.
Explore Quan Bac Sum Pass with Lila Inn & Tours
If you’ve read this far, you can probably already imagine how beautiful Bac Sum Pass is. The best way to feel it for real is on a motorbike: leaning into each curve, breathing in the mountain air, and watching endless hills roll out in front of you. It’s not just a road, it’s part of the Ha Giang experience.
If you’re ready to explore Bac Sum Pass without stress or worries, Lila Inn & Tour is here to help. We offer Easy Rider tours where everything is prepared, so you can relax and enjoy the ride.
With over 8 years of experience and more than 24,000 travelers guided across Ha Giang, Lila focuses on three simple things:
- Safety first with Easy Riders who have over 5 years of riding experience, are professionally trained, and strictly follow safety rules: no overtaking on bends, no riding side-by-side, and never exceeding speed limits.
- Small group tours with fewer than 10 travelers, allowing us to better care for each guest’s experience while ensuring the privacy and personal space you deserve.
- Off-the-beaten-path adventures that take you to lesser-known places most tourists never reach.
With Lila, your journey is not about rushing the road, but about enjoying every moment along the way.
Conclusion
Bac Sum Pass is more than just a mountain road. It is the first real taste of adventure on the Ha Giang Loop, where the scenery opens up and the journey truly begins. Whether you choose a Ha Giang Loop tour 3 days for a short but memorable escape, or continue further on the Ha Giang and Cao Bang Loop, Bac Sum Pass is the gateway into the wild and beautiful landscapes of Northern Vietnam.
You only truly understand what we mean once you are here, standing on the pass and seeing it with your own eyes!
Get your Free Ha Giang Loop Guide Plan your dream trip with our Free guide, including suggested itineraries, top attractions, safety tips, and local insights from Lila Inn & Tours By subscribing you agree to receive marketing communications from us. To opt out, click unsubscribe at the bottom of our emails.
Frequently Asked Questions (FAQs)
Is Bac Sum Pass safe for first-time riders?
Not really. The pass is very steep with sharp curves, so it can be risky for beginners. If you’re not used to mountain roads, joining an Easy Rider tour is the safest choice.
How long and steep is Bac Sum Pass?
The pass is just over 7 km but climbs nearly 450 meters. The road is full of uphill curves and tight bends, so you need steady control and calm riding skills. Going with a local guide is highly recommended if you’re not familiar with steep mountain roads.
Which bike is best for Bac Sum Pass?
A 150cc motorbike is ideal for the steep slopes and rugged terrain. All Lila Easy Rider tours use 150cc+ bikes, and we can help you pick a suitable bike if you ride on your own.
Are there rest stops or coffee spots along the pass?
Yes. Near the top, there’s a viewpoint with small coffee stalls where you can rest and enjoy the mountain view. Search “Check-in Bac Sum Pass” on Google Maps to find it.
