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Hang Ba Deep Jungle Expedition - HB4
Drawing on 15 years of experience in adventure tourism, Oxalis’ 3-day 2-night Hang Ba Deep Jungle Expedition offers a challenge comparable to the Son Doong Expedition. With a maximum of just 8 guests per departure, the journey promises an intimate and truly exclusive experience.
Trek through spectacular limestone mountains and thousands of years old primary forest, home to rare and diverse flora and fauna. Along the way, explore 5 magnificent caves that fewer than 1,000 people in the world have ever set foot in.
Safety is ensured by an experienced expedition team consisting of 1 guide, 3 safety assistants, and 8 porters from the Son Doong team, led by Ho Khanh. The expedition takes you deep into the strictly protected core zone of Phong Nha-Ke Bang National Park, allowing you to experience the wilderness while supporting the preservation of its pristine natural environment.
Conservation has always been at the heart of every Oxalis Adventure expedition. Drawing on years of research and experience in ecotourism and wildlife conservation, the Hang Ba Deep Jungle Expedition has been carefully designed to take travelers deep into the strictly protected core zone of Phong Nha-Ke Bang National Park. This is an invitation for those who have a genuine passion for nature, value conservation, and long to witness the untouched beauty of Vietnam’s extraordinary cave systems.
- Explore 5 epic caves: Embark on a true caving expedition to uncover a remarkable chain of 5 pristine and colossal caves in the area, including Dai Cao Cave, Hang Ba Cave, Vinh Dai Cave, Light Cave, and Vinh Tron Cave. Each cave presents its own distinct marvel, boasting a unique and breathtaking system of ancient stalactites and stalagmites.
- Trekking under an ancient, primeval canopy: Experience the unique thrill of having almost the entire trekking journey unfold beneath the dense, protective canopy of the thousands-of-years-old primary forest in the core zone of Phong Nha-Ke Bang National Park. You will be immersed in a lush, vibrant ecosystem, shielded from direct sun, offering an unparalleled chance to fully explore the area's rich biodiversity and rare timber species.
- Nature's symphony and immersive conservation: Awaken to a rare natural concert in the early morning, the resonant calls of gibbons and exotic birds echoing across the mountains, creating an atmosphere of unique serenity and grandeur. This tour is built upon a strong commitment to nature conservation, minimizing human impact, making it ideal for nature lovers seeking to deeply explore a rich and protected ecosystem.
- Unveiling wildlife secrets via camera trap technology: Engage in a pioneering conservation tourism experience by observing the footprints and traces of rare jungle animals (such as civets, wild cats, deer, and antelopes) at their resting or foraging spots. Crucially, you'll get exclusive access to photos and videos from the specialized camera trap system installed by Oxalis, providing an authentic and non-intrusive look into the wild, hidden life of the National Park's core zone.
- Spectacular camping at cave entrances: You’ll camp at some of the most scenic campsites in the operator’s expedition system, often located right at the entrances of large caves or along cool, refreshing streams, such as the Hang Dai Cao and Hang Vinh Dai campsites. The campsites at the cave entrances offer fresh air, staying cool in summer and warm in winter.
- Ultimate digital detox and authentic challenge: The entire journey is completely disconnected from phone signal and Wi-Fi, allowing for a full "Digital detox" to focus entirely on the wilderness experience. Rated at a high difficulty level (Level 6), this is a genuine challenge that demands excellent fitness and trekking experience, featuring activities like steep climbs and demanding cave exploration, delivering the profound satisfaction of becoming a true adventurer.
- Exclusive privilege: With a small, elite group size of only 8 guests per group, this expedition offers a truly exclusive and personalized experience. The limited number of guests not only ensures the highest quality of service and absolute safety, but also directly and meaningfully contributes to the biodiversity conservation efforts within the World Natural Heritage Phong Nha - Ke Bang National Park. Guests are not only explorers but also companions in the conservation mission in the deep forest core.
The highlights include:
Itinerary
Designed strictly for trekking enthusiasts, the Hang Ba Jungle Expedition requires high endurance and prior experience. Days are long and diverse, averaging 8-10 km of technical trekking, climbing, and cave swimming. Safety is paramount: life jackets are mandatory for swimming, and climbing sections utilize expert support and Oxalis gear. Please note that the itinerary may change due to weather or slippery terrain.
Download the itineraryPhong Nha – Deep Jungle Trek – Dai Cao Cave
Your journey begins between 07:30 and 08:00 with a pickup from your Phong Nha hotel. At the Oxalis office, you’ll receive a safety briefing, sign release forms, and pack your gear. On the way to the trailhead, we stop at the Wildlife Rescue Center to see how the National Park rehabilitates rescued animals for release. The bus then drops you at KM 23 on Victory Road 20, deep within the park.
The expedition kicks off immediately with a steep uphill climb. The route covers 3 km of mostly uphill terrain before descending through dense primeval forest, home to ancient trees and rare wildlife. Be prepared for a challenge: the path includes steep rocky sections with gradients exceeding 45 degrees. We will stop for a jungle lunch surrounded by nature.
By mid-afternoon, we reach the exit of Dai Cao Cave. Equipped with life jackets, you will swim through the cave’s tall main passage. Keep an eye out for unique white fish and shrimp adapted to life in total darkness. After exiting the cave, we settled in at the Dai Cao Campsite. Dinner is served at 18:00.
Hang Ba - Circle Lake Cave - Light Cave - Vinh Dai Campsite
After breakfast, we pack up and begin a 2 km trek through the forest, passing ancient trees and scrambling over rocky terrain to reach Hang Ba. This massive cave features three distinct exits and a stunning emerald underground river-a photographer's dream. Exiting Hang Ba reveals the breathtaking Circle Lake, surrounded by sheer limestone cliffs. We cross the lake to reach our evening destination.
In the afternoon, we trek for around 10 minutes from Circle Lake to explore Circle Lake Cave. With a massive 90m-wide entrance, the cave is a haven for local wildlife seeking food and shelter. We will inspect the camera traps set up here, look for signs of wildlife, and explore the stunning formations deep inside the cave. If we are lucky, we may also witness sunbeams filtering deep into the cave.
After exploring Circle Lake Cave, we continue to Light Cave, a vast 200m-long passage with a turquoise pool inside. Its open passages allow natural light to reach deep into the cave, creating a spectacular setting. Take time to swim, relax, and enjoy the surroundings before following the stream for around 500m to reach the Day 2 campsite at the entrance of Vinh Dai Cave.
Inside the cave, temperatures remain naturally cool in summer and warm in winter. Dinner is served at 18:00. Spend the evening relaxing, chatting with fellow travelers, or stargazing at the Milky Way through the cave’s natural openings.
Vinh Dai Campsite - Km23 Victory Road 20 - Phong Nha
Enjoy a hearty breakfast and the tranquil mountain air before preparing to conquer the final towering peaks. From the campsite, take in the stunning view of Vinh Dai Cave and its beautiful turquoise lake below. Afterward, explore the main passage of Vinh Dai Cave, where its vast chambers and passages offer spectacular photography opportunities.
After lunch at the campsite, the journey begins with an intense, steep hike straight out of the campsite. For the first hour, you will navigate sharp, rocky terrain requiring scrambling, climbing, and crawling over rocky outcrops. In the most difficult sections, our safety team will assist you using harnesses, carabiners, and ropes to ensure a safe ascent.
Once we clear the rocky section, the terrain becomes easier as we continue uphill. A light lunch will be served along the trail before continuing the journey. Depending on the group's pace, we expect to emerge from the jungle at KM 23 on Victory Road 20 between 14:30 and 15:00. An Oxalis bus with cold beverages will be waiting to welcome you back to civilization. Celebrate your achievement with a medal recognizing the completion of Oxalis' most challenging expedition before the bus transfers you back to Phong Nha around 16:00.
Important: As there are no water sources along the trail today, you must prepare and carry at least 2 liters of water before leaving camp.
Suggested itinerary before and after the tour:
To ensure the best preparation before your journey or to relax after the expedition, Oxalis suggests staying at Chay Lap Farmstay if you wish to combine exploring Phong Nha with experiencing a peaceful countryside atmosphere, or Blue Diamond Retreat if you prefer to immerse yourself in nature and enjoy relaxing moments amidst the mountains and forests. Special discounted rates exclusively for Oxalis guests are 1,000,000 VND/room/night at Chay Lap Farmstay and 1,500,000 VND/room/night at Blue Diamond Retreat.
During your time in Phong Nha, the Phong Nha Caves Exploration Museum (open daily from 8:00 AM to 5:30 PM, free admission) is a must-visit destination. Here, you can experience the Son Doong 5D VR technology for 500,000 VND per ticket. All proceeds from this activity are contributed to the Oxalis Foundation to support local community projects, making your journey even more meaningful.
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Adventure level on tour
After many years of adventure tourism activities, Oxalis Adventure has created a Level of Adventure scale to help guests to visualise and choose the adventure tour most suitable for their fitness and health. This scale is not to be applied to other companies or tours with different conditions and terrains. The easiest level (level 1) anyone can join, and the most difficult level - 6 requires regular exercise and some trekking experience.
Those who regularly practise sports or regularly participate in mountain climbing and trekking tours in the forest can complete this tour easily.
Adventure Level 6 · Hard
The Hang Ba Deep Jungle Expedition Tour is rated as the most challenging (Level 6) on the Oxalis adventure level system. The difficulty of the tour is based on the physical fitness and health of average active people, not runners, athletes, or intensely active individuals.
Activities: Extensive rocky terrain, and some technical sections, steep ascents and descents.
The number of guests per tour: Maximum 8 customers; Age 18-70 years old.
- 22km deep jungle trekking
- 5 caves
- Swimming, SUP paddling (optional) in caves
- 3km of rocky hill scrambling
- Total elevation gain: 1.678m
- 2 nights cave camping
- Dark sky observations
- Nature concerts: Bird and animal songs
Terrains
The tour takes place in remote areas with complex terrains. Customers must be physically fit. Please carefully read the tour itinerary and honestly fill out the booking information yourself, especially your experience and health condition.
Physical fitness requirements for The Hang Ba Deep Jungle Expedition Tour
The basic physical fitness requirements for participating in The Hang Ba Deep Jungle Expedition Tour include:
- Trekking experience requirements: Within the last 12 months, it is required to have trekking experience, at least one overnight trek, and 1-2 day treks with the following tour elements: trekking routes through forest/mountain/rocky/steep terrains, covering a minimum distance of 8km per day (equivalent to 5 miles per day), with an elevation gain of at least 300m.
- Fitness Preparation: Engage in strenuous sports such as football, and skiing, or regularly participate in outdoor activities such as walking or running (3-4 times per week, covering 4-5km each time) to maintain physical fitness. This ensures that they are able to:
- Run continuously for 5 kilometres within 50 minutes.
- Climb 5 floors continuously without becoming out of breath or dizzy.
Guests aged 18 to 70 are permitted to join The Hang Ba Deep Jungle Expedition Tour, which demands good physical fitness and prior trekking experience. Those with experience in mountain trekking and good physical health, as well as those who engage in regular sports training, could easily complete this tour.
Some guests on The Hang Ba Deep Jungle Expedition Tour may find it not particularly challenging, while others may encounter difficulties and require assistance from many safety assistants to complete the tour. The tour regulations allow safety experts and/or guides to temporarily suspend the journey, and escort guests out of the forest if significant difficulties are encountered on the itinerary. Refunds or rescheduling are not applicable in such cases.
For more information on the necessary physical activities for a successful trip, please refer to: https://oxalisadventure.com/getting-ready-oxalis-tour/.
Safety on the tour
Safety is always Oxalis Adventure's top priority in order to ensure the safety of both guests and staff on any trip. Oxalis only uses international standard equipment, mainly imported from France, UK and Switzerland, selected, inspected and maintained by cave experts from the British – Vietnamese Cave Expedition Team. Tour guides and safety assistants are responsible for operating these devices and they have to undergo professional training courses and be evaluated regularly.
Otherwise, they will not be allowed to lead the tour. Please read more here about: "safety management" and "safety equipment" that Oxalis uses here.
By signing the Release Form, visitors agree to follow all tour safety regulations and the instructions of the cave experts and guides throughout the expedition. To ensure the safety of the entire group, the safety experts and guides have the authority to require any guest to end the expedition if they fail to comply with the safety regulations explained during the briefing.
Items to bring on Hang Ba Deep Jungle Expedition Tour
Hang Ba Deep Jungle Expedition Tour is a lengthy trekking tour in Quang Tri with many different terrains, so you must prepare for the trip properly. Customers will be asked to prepare suitable clothing for safety and comfort. Clothing should be good for trekking in the jungle, river crossings, or exploring the cave as well as avoiding dangers and risks from sharp rocks, snakes, insects, or poison ivy. Trekking shoes are very important for Hang Ba tour, therefore, visitors need to choose a good and well-fitting pair of shoes for steep rocky terrain. Besides, they also need to prepare personal items for 3 days and 2 nights camping in the jungle and in the cave. The Oxalis tour consultant will give you helpful advice before joining the Hang Ba Deep Jungle Expedition Tour.
You need to prepare
Essential clothing
- Trekking clothes:
- 3 quick-dry, long-sleeved shirts (dark color)
- 2-3 pairs of, long trekking pants (quick-dry)
- Arm cover if wearing short-sleeved T-shirts
- 1 waterproof jacket (winter months December to March) - Campsite clothing sets:
- Warm clothes for winter from December to March
- Shorts and T-shirts for summer from April to June - 1 pair of good gripping trekking/approach closed shoes. Heavyweight trekking boots are not necessary
- 3 pairs of calf-length, thick socks
- 1 pair of sandals/slides for campsite
- Swimwear using at campsites
Personal items
- Mosquito repellent
- Sunglasses, sun hat, sunscreen
- Hand fan for summer (April to June)
- 1-2 medium towels
- Underwear
- Personal hygiene items (toothbrush, toothpaste, nature-friendly shampoo & soap, …)
- Power banks
- Personal medication
- Antifungal foot powder
- Passport
Oxalis provides
- Camping equipment: tent, mattresses, pillow, sleeping bags
- Caving and safety gears: helmet, headlight, gloves, …
- 1 PVC backpack (25L) to carry helmet, dry box, water and things you need during the trek.
- Basic trekking shoes are available to borrow from Oxalis (sizes 36-44). If you use Oxalis shoes, please bring thick socks and two pairs of insoles to help prevent blisters. A 50,000 VND cleaning fee applies.
- Semi-dry bag (15L) for campsite clothing sets
- Water bottle (1L)
- Water purifier
- Compost toilet, toilet paper, hand cleaner
- Dry box for electric devices
- First-aid kit and medical rescue equipment
- Satellite phone
- Secure storage at office
Optional items
- Arm cover if wearing short-sleeved T-shirts
- Camera & Tripod
- Ear plugs
- Bandana or headband
- Rehydration tablets
- Blister prevention tape
Food and drinks in the tour
Although the expedition takes place deep in the primary forest and inside the cave, you will be provided with three meals a day: breakfast, lunch, and dinner. Oxalis has a dedicated team of cooks who prepare fresh ingredients brought directly to the expedition route, ensuring you receive the nutrition you need throughout the long days of trekking.
For your health and safety, all drinking water served during the expedition is treated through a specialised water filtration system and thoroughly boiled at the campsites to meet strict safe drinking-water standards. Hot drinks such as tea and coffee are also available.
The menu offers a variety of options, including standard, vegetarian, and special-diet meals. If you have specific dietary requirements or food allergies, please note them on your booking form so the Oxalis team can make the necessary preparations in advance.
Camping, Showers and Hygiene During the Expedition
Distinct from other tours, our campsites are strategically located inside cave entrances rather than by open water sources. This conservation-first approach ensures that the habitats of thirsty wildlife remain undisturbed while offering you a front-row seat to the underground world.
Your journey begins at Dai Cao Cave, camping beside a flowing stream after a swim-in entry-perfect for sipping tea while stargazing at the Milky Way. The final night is spent at Vinh Dai Cave, situated on a high rock balcony with sweeping views of the river passage and the mist-covered jungle outside. You can find out more details about the "Unique campsites in Hang Ba Deep Jungle expedition tour" here.
Whether trekking in winter (15–18°C) or summer (30–38°C), we provide appropriate gear, including warm sleeping bags or portable tent fans, to ensure a comfortable night's sleep.
Tents: At each campsite, you will stay in tents specially designed by Oxalis. Each tent is set on a sturdy raised platform 30 cm above the ground, helping minimise moisture and insects. The tent walls are made of breathable mesh, with a fan provided inside to keep the space cool while allowing you to stay connected with the surrounding natural environment. Each tent is also equipped with a mattress, pillow, and sleeping bag, all thoroughly cleaned before every expedition to ensure a comfortable night’s sleep.
Toilets and water facilities: Each campsite is equipped with modern toilets and convenient shower facilities. All water used for washing and other daily needs is carefully treated through a filtration system to ensure safe use throughout the expedition.
Waste management and environmental protection: To help preserve the cave ecosystem, 100% of solid waste generated during the expedition is carried out of the cave. For wastewater and toilet waste, Oxalis uses portable septic tanks combined with an advanced filtration system to ensure that discharged water meets Vietnam’s strict environmental standards.
Tour booking process
This is an adventure tour in Vietnam and requires a lot of logistic support. To avoid disappointment and complications, guests should choose the best tour for their fitness, abilities and interests. Reading the tour information carefully will help visitors make the right choice for their trips. The booking process includes the following steps:
Step 1: Learn about the tour
Visit oxalisadventure.com to learn more about the itinerary, highlights, adventure level, tour price, and most importantly, the health and fitness requirements.
Step 2: Choose your departure date
Click “Book Now” on the tour page to view the available departure dates. Available dates will be shown on the calendar. Select your preferred date and enter the number of participants.
Step 3: Provide your information
Complete your contact details accurately, especially your email address and phone number. You must provide truthful information about:
- Your health condition and any medications you are currently taking;
- Allergies or special dietary requirements, such as vegetarian meals or food allergies;
- Trekking experience;
- Exercise frequency and level of physical activity.
Important: Oxalis reserves the right to cancel your booking without a refund if any information provided is found to be false or incomplete, particularly information related to your health and physical fitness.
Step 4: Complete your booking request
Select any additional services you may require, such as transfers or accommodation at Chay Lap Farmstay and Oxalis Home.
Read and agree to the booking terms and conditions, then click “Submit Booking Request.” The system will send a booking code to your email address.
Step 5: Consultation and information confirmation
Within 48 working hours, an Oxalis travel consultant will contact you by email or phone to:
- Provide detailed information about the expedition;
- Confirm your booking details;
- Assist with arranging any additional services you have requested.
Step 6: Payment
Once your information has been confirmed, Oxalis will send you an invoice and payment instructions.
You must complete the payment within 24 hours of receiving the payment instructions. After this period, your booking request may be automatically cancelled.
Step 7: Booking confirmation
Once Oxalis receives your payment, you will receive an official booking confirmation by email.
From this point, you can begin preparing your clothing, equipment, and fitness for the expedition.
Terms of tour cancellation
Hang Ba Deep Jungle Expedition Tour has only 500 guests each year, so available slots are booked quickly. To confirm your booking, you will be required to pay the tour deposit after completing the booking process. For this tour guests need a lot of time to exercise, prepare physically, and prepare the necessary items for the trip. Cancellation of the tour or change of departure date will greatly affect the logistics and operating costs of the tour. In order for Oxalis to make any changes or find a replacement if necessary, the tour cancellation terms are as follows: Cancellations and full refunds can only be made 30 days before the tour departure date. Oxalis will charge 50% of the tour price if you cancel 15 days in advance, and there will be no refund for cancellations within 15 days.See details of the Cancellation Terms here.
Tour price and available dates for booking
- Season: Tours operate from December to June.
- Group Size: Limited to 8 guests per tour for safety and conservation.
- Exclusivity: Capped at 500 guests per year.
- Tour Types: Fixed departure dates for individuals; private tours available for special groups or film crews.
- Exclusive Offer: Enjoy a 10% discount for UOB cardholders and Xiều Oxalis (returning guests).
- Last-Minute Booking Notice: Online bookings close at 19:00 (7:00 PM) the day before departure. For bookings after 19:00, please contact our Adventure Team via chat box or Hotline at +84 919 900 357 (Call/WhatsApp) for immediate assistance and slot availability.
Useful Information Must read
Hang Ba Deep Jungle Expedition 3D2N
Adventure Level: Hard
Age 18-70 years old
Group size: 8 customers
Tour type: Join-in
Operation: December to June
USD 1,132 • VND 30,000,000 VND/pax
Book nowWhether you prefer long treks, camping in a cave, sleeping under the stars in the jungle, swimming underground in river caves, explore the huge dry caves or just taking an exploratory day trip, Oxalis Adventure Tours can provide the right amount of adventure just for you.
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