Haizi Mountain Ancient Ice Cap Relics: G318's Stone Sea & Glacial Lakes

The Haizi Mountain Ancient Ice Cap Relics, locally known as Haizishan Nature Reserve, occupy a 3,000-square-kilometer stretch of high plateau between Litang County and Batang County in Garzê Tibetan Autonomous Prefecture, Sichuan Province. Unlike the lush river valleys or snowy peaks commonly associated with the Sichuan-Tibet Highway (G318), this area presents a desolate, rock-strewn plain that travelers often compare to the surface of Mars.

The landscape is not a mountain range in the traditional sense but rather a rolling expanse of granite boulders, glacial erratics, and thousands of small alpine lakes. Geologists consider it the largest and best-preserved ancient ice cap relic on the Qinghai-Tibet Plateau, a living museum of Quaternary glaciation.

This article provides a practical overview of Haizi Mountain’s geology, highlights, travel logistics, and safety considerations. Since on-the-ground details such as exact ticket structures and seasonal road conditions are subject to change, readers should verify current information with local sources before planning a visit.

Geological Significance: A Window into the Ice Age

Formation of the Ancient Ice Cap

During the Quaternary Glacial Period (roughly 2.58 million to 11,700 years ago), a massive ice cap covered this portion of the Qinghai-Tibet Plateau. As the climate warmed and the ice retreated, it left behind a chaotic deposit of rock debris known as glacial till. The granite boulders—some the size of small houses—were carried and dropped by the moving ice, creating what is now called the "Sea of Stones." This process is typical of glacial landscapes, but the scale and preservation at Haizi Mountain are exceptional across the plateau.

Geologists have identified classic glacial landforms in the area: U-shaped valleys carved by ice, roches moutonnées (asymmetrical rock hummocks indicating ice flow direction), and stone rivers where boulders accumulated in linear patterns. The absence of significant subsequent erosion or human development means these features remain crisp and readable, making the site valuable for scientific study of paleoclimate.

Scientific Value and Recognition

The Haizi Mountain relic is often described as a "live fossil of the Ice Age" in Chinese geological literature. It is recognized as the largest ancient ice cap relic on the Qinghai-Tibet Plateau, surpassing other similar sites in both area and degree of preservation. The area includes not only the boulder fields but also glacial erosion lakes, moraines, and glacial polish on exposed bedrock.

Researchers have used the site to reconstruct the extent and thickness of the former ice cap, though exact numbers vary between studies. For the general traveler, the scientific importance translates into a landscape that feels raw and ancient, with every stone telling a story of climatic change.

The Sea of Stones: A Surreal Boulder Field

Description and Scale

The "Sea of Stones" is the most immediate impression upon entering Haizi Mountain. Granite boulders of all sizes are scattered across the plateau, often in dense concentrations that stretch to the horizon. The rocks are generally grey to reddish-brown, with lichen growth adding subtle color in damp conditions.

There is no systematic arrangement; the boulders lie as the ice left them, creating an almost artistic chaos. The lack of tall vegetation—only low grasses, moss, and occasional small shrubs—accentuates the barrenness. Under a clear sky, the stones reflect harsh sunlight, making the landscape appear monochrome and dusty.

Travelers driving the G318 will encounter this expanse for about 30 to 40 minutes of continuous viewing, as the highway cuts directly through the reserve. The transition from the greener landscapes of Litang to the stony plateau is abrupt, marking a dramatic shift in scenery.

Best Viewing Points

The most accessible viewpoint is at the Haizi Mountain pass (approximately 4,685 meters). Here, the G318 crosses the highest point of the reserve, and a designated pull-off area allows parking. From this spot, the sea of stones extends in all directions, with distant snow-capped peaks on the horizon.

Another notable area is near the Sister Lakes (discussed below), where the juxtaposition of turquoise water and grey rock is most photogenic. For those seeking a deeper experience, short walks away from the road are possible, but the terrain is uneven, and altitude can make walking strenuous.

Photography tip: The best light for photographing the boulder fields is early morning or late afternoon, when long shadows create texture and depth. Midday sun tends to flatten the scene and cause glare. A polarizing filter can reduce glare from wet rocks and enhance lake colors.

The Land of a Thousand Lakes: Glacial Gems

Formation and Number of Lakes

The name "Haizi" derives from a local term for "lake," and the plateau delivers on that name with an estimated 1,144 alpine lakes. These are glacial erosion lakes, formed when ice sheets scoured depressions that later filled with meltwater and rainwater.

The lakes range in size from small ponds to bodies several hundred meters across, and many are interlinked by seasonal streams. Their colors vary from emerald green to deep turquoise, depending on depth, mineral content, and sediment.

The lakes are scattered irregularly across the plateau, often nestled among boulder fields. From the G318, many are visible as blue or green flashes in the stone landscape, especially after snowmelt in late spring and summer. The density of lakes is highest near the central part of the reserve, but the roadside offers numerous glimpses.

Sister Lakes: The Iconic Photo Spot

The Sister Lakes (also called Haizishan Twin Lakes) are the most famous of the 1,144. They sit side by side just below the mountain pass, separated by a narrow strip of land. The lakes are typically turquoise, with clarity that depends on season and weather.

A viewing platform on the south side of the G318 provides an elevated perspective for photographing both lakes, with the surrounding boulders and distant peaks as backdrop. In summer, wildflowers sometimes bloom in scattered patches near the water, adding a rare splash of color.

Because the Sister Lakes are one of the few officially developed viewpoints along this stretch of the G318, they attract most visitors. It is advisable to stop early in the day to avoid crowds (especially during summer weekends and national holidays). The platform has basic parking, but no permanent restrooms or shops—travelers should come prepared.

Human History: The Tea Horse Road Barrier

Historical Significance

Long before the G318 was paved, the Haizi Mountain plateau was a formidable obstacle on the ancient Tea Horse Road (Cha-Ma Gu Dao), a network of caravan routes linking Sichuan and Tibet. Caravans carrying tea, salt, and other goods faced extreme altitude, unpredictable weather, and the challenge of navigating the rocky terrain.

Local legends speak of the "Golden Horse" grassland (Jinma Grassland) near Litang, where caravans would rest before attempting the crossing. The area was known as a "ghost gate" for its harsh conditions and the risk of losing pack animals or porters to altitude sickness or hypothermia.

No structures or monuments from the tea horse era remain visible in the reserve, but the sense of historical hardship adds a layer of meaning for travelers who pause to imagine the past. The modern asphalt road makes the crossing a matter of hours rather than days, yet the landscape still demands respect for its isolation.

Cultural Context

The region is part of the traditional Tibetan cultural area of Kham, and the nearest towns (Litang, Batang) have significant Tibetan populations. Travelers may see prayer flags at the pass or hear of sacred mountain associations.

The lakes and boulders are not typically considered sacred in the same way as some other Tibetan peaks, but local herders occasionally graze yaks in the area. Interaction with locals is limited along the highway, but respectful photography and awareness of cultural norms (e.g., not disturbing stone cairns) are appreciated.

Practical Travel Guide: How to Experience Haizi Mountain

Best Time to Visit

Summer (June to August) and autumn (September to October) are the recommended seasons. In summer, temperatures are milder (though still cold at altitude), and wildflowers may appear near lakes and streams. Autumn offers clearer skies, reduced rainfall, and generally good visibility for photography.

Winter (November to March) brings heavy snow, icy roads, and often closure of the mountain pass if conditions become dangerous. Spring (April to May) can be windy and dusty, with lingering snow at higher elevations. The source data indicates winter is "extremely harsh," so planning outside that season is wise.

Altitude and Safety Considerations

The average altitude of the Haizi Mountain reserve is around 4,500 meters, with the mountain pass reaching approximately 4,685 meters. This is a high-altitude environment, and acute mountain sickness (AMS) is a real risk for most people. Symptoms include headache, nausea, dizziness, and shortness of breath. Travelers are advised to:

• Ascend gradually from lower altitudes (e.g., spend a night in Kangding or Litang at 2,600-4,000 m).
• Drink plenty of water, avoid alcohol, and refrain from strenuous activity.
• Carry supplemental oxygen or portable hyperbaric bags if sensitive.
• Descend immediately if severe symptoms (vomiting, confusion, difficulty walking) occur.

No emergency medical facility exists within the reserve. The nearest hospitals are in Litang County (about 2.5 hours east) or Batang County (about 1.5 hours west). Travelers with pre-existing heart, lung, or blood pressure conditions should consult a doctor before going.

Safety note: Do not attempt to walk far from the road. The terrain is uneven, and mobile phone coverage is unreliable. If you stop, stay near your vehicle and travel with a companion if possible.

Transportation and Access

The reserve is accessible primarily by driving the G318, which is well-paved in this section. However, road conditions can change with weather—summer thunderstorms may cause brief flooding, and winter snow can block the pass. Most travelers drive themselves in a private car, hire a driver from Litang or Batang, or join a tour group traveling the Sichuan-Tibet Highway.

There is no public bus that stops at Haizi Mountain specifically, but long-distance buses between Litang and Batang pass through. Passengers can ask to be dropped at the viewing platform, but arranging onward transport may be challenging. Recommended itinerary: start from Litang (4,014 m), drive 1.5-2 hours to the pass, take photos, then continue to Batang (2,580 m) for a lower-altitude overnight stay.

Photography Tips

• Lighting: Shoot during sunrise (around 6-7 am in summer) or late afternoon (5-6 pm). Midday light is harsh.
• Equipment: A wide-angle lens captures the vastness; a telephoto lens isolates individual boulder formations or lakes.
• Filters: Circular polarizer to cut glare and increase contrast; UV filter to protect lens from windblown dust.
• Drones: Drone regulations in Chinese nature reserves are complex. As of the source data, no clear drone policy is provided for this site. According to general rules, flying drones within protected areas may require permits from the forestry or tourism authority. Check with local authorities before flying. Many travelers report flying small drones at the Sister Lakes without issue, but this is not guaranteed.
• Composition: Include a person or vehicle for scale. Use leading lines from the road or rock patterns.

Who Should Go and Who Should Skip

Good fit for: Geology enthusiasts, landscape photographers, adventurous road trippers, travelers seeking solitude and unique landscapes, and those already on the G318 between Litang and Batang.

Not recommended for: Travelers prone to severe altitude sickness, those expecting lush green scenery or active hiking trails, families with very young children or elderly with health issues, and visitors with only a day to spare (the altitude impact is more manageable if you stay low overnight before and after).

Frequently Asked Questions

Where is Haizi Mountain located?
It is situated between Litang County and Batang County in Garzê Tibetan Autonomous Prefecture, Sichuan Province, along the G318 highway.

What is the altitude of the area?
The reserve has an average altitude of about 4,500 meters, with the mountain pass reaching approximately 4,685 meters. Visitors should be aware of altitude sickness.

Is there an entrance fee?
Driving through the G318 highway which cuts through the reserve is free. There are designated viewing platforms (like for the Sister Lakes) that are generally open to the public without a ticket, though specific developed spots might implement fees in the future. Confirm locally before your visit.

Why is it called "Ancient Ice Cap Relics"?
It preserves the geological evidence of a massive ice cap from the Quaternary Glacial Period, including moraines and glacial erosion features that are rarely seen on such a scale.

What is the best time to visit?
The best time is from June to October. Summer offers wildflowers among the stones, while autumn provides clear skies and high visibility. Winter can be extremely harsh with heavy snow.

How many lakes are there at Haizi Mountain?
Approximately 1,144 alpine lakes of glacial origin, with the Sister Lakes being the most famous.

Can I camp overnight at Haizi Mountain?
Overnight camping is not recommended without proper preparation. There are no designated campgrounds, facilities, or weather shelters. The altitude and temperature (even in summer, nights can drop below freezing) make it risky. It is safer to stay in Litang or Batang.

Are there any facilities at the viewing platforms?
The Sister Lakes platform offers parking and a marked viewing area, but no toilets, shops, or drinking water. The restrooms are not available consistently. Travelers should bring their own supplies and pack out all trash.

What kind of vehicle is required?
A standard sedan can handle the paved G318 in fair weather. However, during winter snow, a 4WD with snow chains is necessary. If you plan to drive to less-maintained viewpoints off the main road, a high-clearance vehicle is recommended.

Is the site suitable for children?
Children may enjoy the novelty of the landscape but risk altitude sickness even more than adults. The lack of safety barriers near rocks and water also poses a hazard. If bringing children, keep them close and watch for symptoms of AMS.

Can I fly a drone?
Regulations are unclear. Some travelers report flying drones without incident. However, as a general rule, commercial filming in nature reserves requires a permit. For recreational use, check with the local tourism bureau in Litang or Batang. Be respectful of other visitors and wildlife.

What should I pack?
Sunscreen, sunglasses, windscreen, warm layers (fleece, down jacket), water, snacks, first aid kit (including AMS medication if prescribed), fully charged phone or camera, and wet wipes. A portable power bank is useful as there are no charging points anywhere in the reserve.

Note: This article is based on the source data provided, which reflects the situation as of the publication date. Road conditions, ticket policies, and facility availability are subject to change. Always verify with the Litang or Batang tourism offices before travel, especially during off-seasons or special events.