If you're looking for a trekking adventure in northern Vietnam, Phia Oac–Phia Den National Park offers an incredible opportunity to explore stunning landscapes, diverse wildlife, and pristine forests. Located in Cao Bang Province, this park is a hidden gem that remains relatively unknown compared to other popular trekking destinations, making it the perfect escape for nature lovers and adventure seekers. In this guide, we’ll walk you through everything you need to know about trekking in Phia Oac–Phia Den National Park, from the best trekking trails to essential tips for a safe and enjoyable experience.

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Overview of Phia Oac–Phia Den National Park
Phia Oac–Phia Den National Park is a natural reserve located in Cao Bang Province, covering more than 1,000 square kilometers of diverse landscapes, including dense forests, high mountains, and gorgeous waterfalls. The park is famous for its biodiversity, with a range of flora and fauna unique to the area. If you’re a nature enthusiast, you’ll love the chance to spot rare species, including the White-headed Langur, a critically endangered monkey.
One of the best things about this national park is that it’s not overrun by tourists, so you can truly immerse yourself in the untouched beauty of the area. Whether you’re looking for a multi-day trek or a shorter, scenic hike, Phia Oac–Phia Den has something for everyone.
Best Trekking Trails in Phia Oac–Phia Den National Park
Phia Oac–Phia Den National Park is known for its stunning trekking trails, ranging from easy walks to challenging hikes that take you deep into the heart of the park. Here are some of the top trails:
Phia Oac Peak Trek
The trek to Phia Oac Peak is one of the most popular and rewarding hikes in the park. The trail is relatively moderate and takes you through dense forests filled with bamboo groves and wildflowers. Along the way, you’ll be treated to incredible views of the surrounding mountains and valleys.
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Distance: Approximately 6–8 kilometers
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Duration: 4–5 hours
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Difficulty: Moderate
At the summit, you’ll be rewarded with panoramic views of the entire national park, including nearby Phia Den Peak. The summit area is often misty, which adds to the mystical atmosphere of the place.

Phia Den Peak Trek
For those who prefer a more challenging adventure, the trek to Phia Den Peak offers a thrilling experience. This trail is steeper and more rugged, but the rewards are well worth the effort. Along the way, you’ll pass through dense jungle, cross small streams, and enjoy the serenity of the wilderness.
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Distance: Approximately 10–12 kilometers
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Duration: 6–8 hours
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Difficulty: Challenging
The trek to Phia Den Peak requires some stamina, as the ascent is steeper, but once you reach the top, the views of the surrounding forests and valleys are breathtaking. It’s a great spot for those looking to experience the wild beauty of the park.

Waterfall Trails
Phia Oac–Phia Den is also home to several stunning waterfalls, such as Ngườm Ngao Waterfall and Thác Bản Giốc, which are located near the park. These waterfall trails are perfect for those looking for a shorter, more relaxed hike. The trails are easy to moderate in difficulty and offer a chance to experience the park’s lush vegetation and tranquil atmosphere.
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Distance: Varies (short walks to longer hikes)
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Duration: 1–3 hours
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Difficulty: Easy to moderate
These shorter trails are great for those who are not looking for a full-day trek but still want to enjoy the beauty of the park’s water features.
What to Expect on Your Trekking Adventure
When trekking in Phia Oac–Phia Den National Park, here’s what you can expect:
Breathtaking Scenery
The park is home to some of the most stunning landscapes in Vietnam. You’ll pass through lush forests, high mountain peaks, and breathtaking valleys, all while surrounded by the sounds of nature.
Wildlife and Flora
Phia Oac–Phia Den is a biodiversity hotspot. You’ll have the chance to spot unique wildlife, including rare primates, deer, and a variety of birds. The park is also known for its rich flora, including medicinal plants, ferns, and orchids.
Peaceful Atmosphere
One of the most striking features of Phia Oac–Phia Den National Park is its peace and tranquility. Unlike more touristy destinations, the park offers a calm and immersive experience, perfect for those who want to disconnect from the hustle and bustle of city life.

Essential Tips for Trekking in Phia Oac–Phia Den National Park
Prepare for Variable Weather
The weather in the park can change quickly, especially in the mountains. Bring appropriate clothing for both warm and cool weather, as temperatures can drop significantly at higher elevations, even during the day. A rain jacket is also a must, as showers are common.
Hire a Local Guide
While the trails are marked, it’s always a good idea to hire a local guide who is familiar with the park. A guide can help you navigate the trails, point out interesting wildlife and plant species, and ensure your safety.
Bring Sufficient Water and Snacks
The trekking trails can be demanding, especially the longer hikes. Be sure to bring enough water and high-energy snacks to keep you fueled throughout your journey.
Wear Proper Footwear
The trails in Phia Oac–Phia Den National Park can be rocky and uneven. Wear sturdy, waterproof hiking boots to ensure comfort and prevent injury.
Respect the Environment
As you explore the park, be sure to follow Leave No Trace principles. Stay on marked trails, avoid disturbing wildlife, and pack out all your trash.

Conclusion
Phia Oac–Phia Den National Park is a must-visit destination for nature lovers and adventure enthusiasts. Whether you’re looking for a challenging hike to the top of Phia Den Peak, a more relaxed stroll to a waterfall, or simply a peaceful escape in the heart of Vietnam’s wilderness, this national park offers something for everyone. With the right preparation, a knowledgeable guide, and a sense of adventure, you’re sure to have an unforgettable trekking experience in Phia Oac–Phia Den National Park.
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