Tam Diep Pass Thanh Hoa: Historical value, landscape exploration

Travel Guide
13/11/2025
Tam Diep Pass Thanh Hoa is not only a "gateway" connecting the North Central region but also a heroic historical witness of Vietnam. This pass is attractive thanks to its majestic scenery, modern transportation infrastructure, and tourism development potential, promising many unique experiences that you can hardly miss.

1. Overview of Tam Diep Pass, Thanh Hoa

1.1. Geographical location and natural characteristics

Stretching across the border connecting Ninh Binh province and Thanh Hoa province, Tam Diep Pass is located in Quang Trung ward, Thanh Hoa province. The limestone mountain range forms a magnificent natural wall, dividing the Red River Delta in the North and the Ma River Delta in the South.

Đèo Tam Điệp nằm trên địa phận phường Quang Trung, tỉnh Thanh Hóa.

Tam Diep Pass is located in Quang Trung ward, Thanh Hoa province. (Source: Collected)

The special highlight of the Tam Diep Thanh Hoa Pass is three consecutive slopes, with heights ranging from 70 to 110 m. The limestone mountain range stretches in the Northwest - Southeast direction, creating a layered landscape of majestic mountains. The scenery becomes even more attractive when vast valleys appear between the mountain ranges, along with natural lakes like Yen Thang, Mua Thu, Long Den, adding a poetic touch to this land.

The rich cave system includes Con Moong cave, Nguoi Xua cave, Tam Giao cave, creating a mysterious and diverse space. On the limestone slopes, primary forests cover a cool green, contributing to a wild and original natural picture.

1.2. Names and meanings of the names

The name "Tam Diep" in ancient documents implies "three layers, three slopes", reflecting the characteristic terrain of three consecutive pass slopes on the old road. Locals often call this place Deo Ba Doi, a familiar, easy-to-remember, and folk-colored name.

Tam Diep Thanh Hoa Pass was once a natural boundary between two important lands. During the Hau Le dynasty, this was the dividing line between the two Thanh Hoa Noi and Thanh Hoa Ngoai provinces. Further back, this area was also known as Cuu Chan Quan, marking the boundary between the two districts of Cuu Chan and Giao Chi.

Not only does the name have topographical significance, but it also reflects strategic and cultural importance through many dynasties. Tam Diep Thanh Hoa Pass has always been an important transportation point, where all North-South journeys arrive.

2. Tam Diep Thanh Hoa Pass in the flow of history

2.1. Tam Diep Pass with the ancient Thien Ly Road

Đèo Tam Điệp Thanh Hóa là cửa ải trọng yếu trong mạng lưới giao thông cũng như quân sự thời phong kiến.

Tam Diep Pass Thanh Hoa is a crucial pass in the transportation and military network of the feudal era. (Source: Collected)

On the Thien Ly road connecting Thang Long to the South, Tam Diep Pass Thanh Hoa became a crucial pass playing a vital role in the transportation and military network of the feudal era. Its special location meant that all land routes connecting the two regions had to pass through this pass, adding strategic importance to the area.

Merchants, envoys, and troops passing through all stopped here to prepare for the next long journey. Tam Diep Pass Thanh Hoa served as a vital control point, ensuring the smooth flow of trade routes.

To this day, old trails still bear traces on the mountainside, like reminders of the many people who once crossed these steep passes. The sound of horses' hooves, the echo of bells, and the calls of porters seem to linger in the mountainous region.

2.2. Military defense line and historical traces

Through many upheavals, Tam Diep Pass Thanh Hoa affirmed its position as an important strategic defense line. In 1788, the Tay Son army chose this location as the starting point for the campaign to advance towards Thang Long, affirming the region's role in defending the country.

On the summit of the pass, a stone stele inscribed with a poem by King Thieu Tri from 1842 with the words "Quá Tam Điệp sơn" still remains, reminding us of the court's attention to this land. Some defense relics such as Luy Don Dau and Tam Diep ancient citadel are still present, serving as vivid testaments to history.

Tam Diep Pass Thanh Hoa not only appears in historical records but also in many literary works. Poems by Ho Xuan Huong and Phan Huy Chu have vividly depicted the majestic and rugged beauty of the passes here, leaving their mark on the national poetic heritage.

2.3. Cultural and traditional values of Thanh Hoa and Ninh Binh regions

In folk cultural life, Tam Diep Pass Thanh Hoa is a symbol of the defensive strength and resilient spirit of the local residents. Folk verses and proverbs about the pass have been passed down, reflecting a strong imprint on the community's consciousness.

Den Dau, Den Song, Mieu Than Phu, along with the spiritual belief system, contribute to highlighting the cultural identity of the limestone mountain region. Many traditional festivals are held throughout the year, serving as occasions to pray for good harvests and to strengthen community bonds.

Handicraft professions such as mat weaving and making agricultural tools from bamboo and rattan are still maintained and developed. Local cuisine featuring specialties from the mountains creates an attractive highlight, bringing visitors closer to the indigenous culture.

3. Modern role and new infrastructure at Tam Diep Pass Thanh Hoa

3.1. National Highway 1A, North-South Expressway through Tam Diep Pass

Tam Diep Pass continues to play a key role in the national transportation system with the presence of the modern National Highway 1A. The large-scale North-South Expressway has also been put into operation, creating a new route for regional transportation.

Modern transportation infrastructure helps shorten travel time and enhance safety for travelers. The new routes are designed harmoniously with the natural landscape, preserving the pristine beauty of the limestone mountains.

The regional connectivity through Tam Diep Pass Thanh Hoa is increasingly evident, strongly promoting economic, commercial, tourism, and investment development in the area.

3.2. Tam Diep Tunnel Project: A breakthrough in connectivity infrastructure

Hầm Tam Điệp là minh chứng cho bước tiến đáng kể của kỹ thuật xây dựng nước nhà

Tam Diep Tunnel is a testament to the significant progress of our nation's construction techniques. (Source: Compiled)

The Tam Diep Tunnel, with its two large-scale tunnels piercing through the mountain, is a testament to the significant progress of our nation's construction techniques. This project not only overcomes topographical challenges but also contributes to protecting the precious natural landscape of Tam Diep Pass Thanh Hoa.

With its great length and superior scale, the Tam Diep Tunnel significantly shortens travel time compared to the traditional mountain pass route. Modern lighting, ventilation, and safety systems provide convenience for all types of vehicles.

The emergence of this project has opened up more opportunities for tourism service development. Visitors to Tam Diep Pass Thanh Hoa can easily access nearby attractions, while still having the option to choose the old mountain pass route to enjoy the feeling of conquering the mountain slope.

3.3. Tam Diep Pass Thanh Hoa, a new check-in point on the tourist map

Recently, Tam Diep Pass Thanh Hoa has become known as an attractive stopover on the Northern tourist map. The Ba Doi Monument House, with its impressive architecture, has become a favorite backdrop for many young people wishing to capture beautiful photos.

The Tam Diep Pineapple Garden, with its long rows of lush green pineapple plants, creates a peaceful and poetic rural scenery. During the pineapple harvest season, visitors will have the opportunity to admire the scenery and enjoy the unique taste of the region's specialty.

The combination of majestic mountains and lush green valleys makes Tam Diep Pass a paradise for those passionate about collecting beautiful nature photos. From the top of the pass, visitors can cast their eyes to encompass the entire scenery of Ninh Binh and Thanh Hoa provinces.

4. Guide to traveling and experiencing Tam Diep Pass Thanh Hoa

4.1. Route from Ha Noi, Ninh Binh to Tam Diep Pass Thanh Hoa

To explore Tam Diep Pass Thanh Hoa, the most convenient route is via National Highway 1A. From Ha Noi, the distance is about 120 km, while from Ninh Binh center, it only takes 20 to 25 km. Cars, motorbikes, or passenger buses can easily travel on this route.

Lộ trình thuận tiện nhất để khám phá đèo Tam Điệp Thanh Hóa.

The most convenient route to explore Tam Diep Pass Thanh Hoa. (Source: Google Maps)

If you want to enjoy the experience on a modern highway, you can take the new highway with a high-quality road surface. However, the National Highway 1A road is suitable for those who want to sightsee and stop at many interesting points along the way.

Throughout the journey, you should take time to stop at the rest stops on the pass to breathe in the fresh mountain air. Places like the Tam Diep pineapple garden, Yen Thang Lake, and Ba Doi Memorial House all have convenient parking areas, with views overlooking beautiful limestone mountain scenery.

4.2. Travel itinerary combining exploration of historical sites, pineapple gardens, and scenic experiences

A full day exploring Tam Diep Pass Thanh Hoa should start early in the morning by learning about the Tam Diep defense line, a place that preserves historical traces and remaining evidence from various dynasties.

Afterwards, visit the Ba Doi Memorial House to capture souvenir photos against the majestic limestone mountains. Leaving the memorial house, you can go to the nearby Tam Diep pineapple garden to enjoy the fresh green space and enjoy fresh pineapple right in the garden.

As the afternoon arrives, Canh Chim Lake and Tam Giao Cave are perfect choices for relaxation, immersing yourself in the poetic natural scenery. For lunch and dinner, visitors can enjoy dishes such as Thanh Hoa fermented pork roll, Ninh Binh mountain goat, burnt rice, and free-range chicken at restaurants along the pass to fully experience the landscape and cuisine of this area.

4.3. Notes and tips for traveling and visiting Tam Diep Pass Thanh Hoa

When exploring Tam Diep Pass Thanh Hoa, visitors should prepare comfortable sportswear and hiking shoes with good grip, as the limestone terrain can be slippery.

Traveling in groups or with a local guide will help visitors understand the local culture and history more deeply. It is advisable to bring snacks, drinks, and necessary items for the hiking trip.

To take beautiful photos, choose early morning or late afternoon when the sunlight is soft. The highest points on the pass or along Yen Thang Lake are ideal places to capture impressive moments. Visitors should also avoid traveling on days with heavy rain or dense fog to ensure safety.

5. Practical experience & review of Tam Diep Pass Thanh Hoa destination

5.1. Review of actual experience

Tam Diep Pass Thanh Hoa offers visitors unique experiences thanks to the harmonious combination of majestic limestone mountains, sprawling pineapple gardens, and diverse historical sites. This place preserves both deep historical value and the pristine beauty of nature.

The tourism service system at Tam Diep Pass Thanh Hoa is also increasingly improving, including guesthouses, specialty restaurants, and convenient rest stops. These rest stops have advantages in terms of amenities and convenience for visitors' exploration journeys.

The richness of experiences is the biggest attraction, as visitors can both explore and learn about historical sites, and enjoy an ideal ecological space. The Tam Diep pineapple garden becomes a unique mark, leaving an unforgettable impression on everyone who visits.

5.2. Suggested combination of visits to ecological tourism experiences in the Ninh Binh - Thanh Hoa region

A reasonable combined itinerary could start by checking in at historical sites and scenic spots at Tam Diep Pass Thanh Hoa in the morning. Afterwards, visitors can enjoy lunch with local specialty dishes, and in the afternoon, experience modern entertainment and recreational spots in the area.

Trang An Ninh Binh with its unique cave system is an ideal choice for those who love ecological tourism. Yen Thang Lake, Dong Giao Lake, and Tam Giao Cave are also perfect additions to the itinerary.

Combining Tam Diep Pass Thanh Hoa with modern ecological activities opens up diverse travel experiences. Visitors can immerse themselves in historical spaces while enjoying modern entertainment facilities, increasing the appeal of each trip.

Quảng trường biển Sầm Sơn là điểm dừng chân lý tưởng để cảm nhận nhịp sống sôi động bên bờ biển.

Sam Son Sea Square is an ideal stop to feel the vibrant life by the sea. (Source: Collected)

Especially, upon concluding the journey, Sam Son Sea Square, one of the new symbols of Thanh Hoa tourism, will be an ideal stop to feel the vibrant life by the sea, admire the sparkling night scenery, and conclude the exploration with memorable moments.

Tam Diep Pass Thanh Hoa has affirmed its position as a perfect destination combining deep historical values, majestic natural landscapes, and modern transportation infrastructure. With the Tam Diep tunnel project and the new expressway, this is the ideal time for you to explore this special land and leave unforgettable impressions!

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