Thorong La Pass: Complete Guide to Nepal's 5,416m High Mountain Pass

When you trek the Annapurna Circuit, you will reach its highest point at 5,416 m. This destination is called Thorong La.

It connects the green, high-valley Manang region in the east with the dry, wind-carved Mustang region in the west, and crossing it is the single biggest day of the entire circuit.

You crossed east to west in one long day: Thorong Phedi or High Camp → pass → Muktinath.

Where Is Thorong La Pass Located?

Thorong La lies between the Manang district and the Mustang district in north-central Nepal.

Trekkers approach from the Manang side, climbing through Yak Kharka and Ledar to reach Thorong Phedi (~4,450m) or Thorong High Camp (~4,850m).

From there the trail climbs to the pass at 5,416 meters, then drops steeply down the Mustang side toward Muktinath.

The classic crossing sequence is straightforward: Manang, then Yak Kharka, then Ledar, then Thorong Phedi or High Camp, then over Thorong La, and finally down to Muktinath at around 3,800 meters. That long descent into the Kali Gandaki valley closes the highest and most exposed part of the circuit.

How High Is Thorong La Pass?

Thorong La Pass stands at exactly 5,416 meters (17,769 feet). To put that in perspective, it is higher than Annapurna Base Camp and higher than many of Nepal's well-known viewpoints. At this elevation there is roughly half the oxygen available compared to sea level, which is why pacing and acclimatization matter far more than raw fitness.

How Difficult Is Thorong La Pass?

Thorong La is difficult because of four combined factors: high altitude, a very long trekking day, a steep sustained ascent, and a punishing descent.

It is not a technical climb, so you do not need mountaineering experience, but you do need endurance, patience, and proper acclimatization to cross it safely.

High Altitude

At 5,416 meters the air is thin, and your body simply cannot perform the way it does lower down.

Expect to breathe hard even on gentle slopes, and expect your pace to slow dramatically. Altitude sickness is a genuine risk here, which is why the days before the pass are built around gradual acclimatization.

Long Trekking Day

Crossing day is far longer than a typical circuit day. From Thorong Phedi you may be walking for 7 to 9 hours including the climb and the long descent to Muktinath.

Starting before dawn is standard practice, both to reach the pass before the wind picks up and to leave enough daylight for the descent.

Steep Ascent

The climb from Thorong Phedi to High Camp is steep and relentless, gaining around 400 meters in a short distance. Above High Camp the gradient eases into a series of false summits that test your patience.

Each time you think the top is close, another rise appears, and in thin air this wears on you mentally as much as physically.

Long Descent

The challenge does not end at the top. The descent from 5,416 meters down to Muktinath drops roughly 1,600 meters over loose, rocky, often dusty trail.

This section is hard on knees and quads, and many trekkers find the descent more exhausting than the climb. Trekking poles genuinely help here.

Our verdict: Thorong La is a serious high-altitude challenge, but it is a walk, not a climb. Prepare well and it becomes one of the most rewarding days you will ever spend in the mountains. For a wider view of what the route demands, read our Annapurna Circuit difficulty guide.

Best Time to Cross Thorong La Pass

The two best seasons to cross Thorong La are spring (March to May) and autumn (September to November), when the pass is usually open, skies are clearer, and temperatures are more manageable. Winter and monsoon both bring serious complications.

Spring — March to May

Spring brings warming temperatures, generally stable weather, and rhododendron blooms lower on the trail. Trail conditions are good, visibility is strong on clear mornings, and the pass is normally open. This is one of the most reliable windows for a comfortable crossing.

Autumn — September to November

Autumn offers the most settled skies of the year, crisp mountain views, and dry trails after the monsoon. It is also the busiest season, so expect fuller teahouses at Phedi and High Camp and more people on the trail on crossing day. Book beds early during peak weeks.

Winter — December to February

Winter means deep cold, heavy snow, and a real risk of the pass being closed or dangerous after snowfall. Some trekkers still cross in early winter with good conditions, but you must be flexible and prepared to turn back. Sudden snow can block Thorong La for days.

Monsoon — June to August

The monsoon brings rain, slippery trails, leeches, and unstable weather on the lower and middle sections. However, the very top around the pass sits in a partial rain shadow. If you want reliable dry summer trekking in Nepal, Upper Mustang and Upper Dolpo lie fully in the Himalayan rain shadow and stay dry through June to August, unlike most of the country.

Our recommendation: aim for late spring or October for the best balance of open trails, clear views, and manageable cold on Thorong La.

What Is Thorong La Pass Weather Like?

Thorong La Pass weather is cold, windy and unpredictable, even during the main trekking seasons. Before sunrise, temperatures around High Camp can drop to -5°C to -15°C, while strong winds make it feel much colder. Snowfall is possible throughout the year, and clear mornings can turn cloudy within hours.

October is generally the most stable month for crossing, followed by November and April. Spring (March–May) is also a good option, although early-season snow may remain on the trail. Winter (December–February) brings much colder nights, deep snow and possible pass closures. During the monsoon (June–August), the upper Manang and Mustang areas receive less rain, but lower trails can experience landslides and poor visibility.

One important rule: never judge pass conditions by the weather in Manang or Muktinath. Check the forecast and ask your guide or lodge owners about recent snowfall and wind before crossing. If heavy snow is falling, wait rather than risk the crossing.

Thorong La Pass Altitude Sickness

Altitude sickness is the single biggest danger on Thorong La. Acute Mountain Sickness (AMS) can affect anyone above 3,000 meters, regardless of age or fitness, and ignoring it near the pass can be life-threatening. Symptoms include headache, nausea, dizziness, poor sleep, and loss of appetite.

Fitness does not protect you from altitude sickness. Strong, athletic trekkers often push too hard and get sick precisely because they climb too fast. The proven rule above 3,000 meters is to keep your sleeping-elevation gain to no more than 300 to 500 meters per day, with acclimatization rest days built in, such as the standard rest day in Manang.

How to Reduce Altitude Risk

Acclimatize gradually, follow a sensible itinerary with a rest day at Manang, drink plenty of water, and walk at a slow, steady pace. Listen to your body, never push through severe symptoms, and descend immediately if you develop signs of HAPE or HACE. Descent is the only reliable cure.

Medication is not a substitute for acclimatization or medical advice. You also need insurance that specifically covers high-altitude emergency helicopter evacuation up to 6,000 meters and treatment for AMS, HAPE, and HACE. Standard travel insurance is not enough, and this cover is legally required for restricted-area permits elsewhere in Nepal.

What to Pack for Thorong La Pass

For crossing day specifically, prioritize warmth, wind protection, and sun defense. The pass is far colder and windier than the rest of the circuit, so a few key items make the difference between a hard day and a miserable one.

For the full trek, see our Annapurna packing checklist and adapt the cold-weather items for the higher pass. Carry a reusable bottle with a UV purifier, Sawyer filter, or chlorine dioxide drops. Please do not buy single-use plastic bottled water on the trail; it harms the fragile mountain environment.

Lodging, Food, Costs and Connectivity

The Annapurna Circuit is a teahouse trek, so you do not need to carry camping equipment. However, accommodation and food become more expensive as you climb towards Thorong La Pass. Above Manang, budget around USD 25–40 per day for a room and meals, excluding guide and porter costs.

Licensed guides typically cost USD 25–35 per day, while porters cost USD 20–25. Rates are generally similar along the route.

A few practical things to know:

• Book early: High Camp has very few lodges. Rooms fill quickly in October and April, so arrange accommodation in advance or arrive by early afternoon.

• Expect basic rooms: Phedi and High Camp rooms are usually unheated. Dining rooms may have a stove in the evening.

• Carry cash: ATMs in Manang and Jomsom can be unreliable. Withdraw enough Nepali rupees before heading into remote sections.

• Mobile and Wi-Fi: NTC and Ncell coverage is patchy. You may get a signal in Manang or occasionally Phedi, but do not expect connectivity at the pass.

• Drink safely: Refill at ACAP safe-water stations or treat water using a filter, tablets or UV purifier. Avoid relying on plastic bottled water.

• Tipping: A tip of around 10–15% of guide or porter wages is a common guideline.

These are approximate 2026 operator estimates. Actual prices vary by season and lodge. Guide, porter, permit and transport costs may already be included in an agency's package, so check what your trek price covers.
Getting to and Away from the Annapurna Circuit

Most trekkers start the Annapurna Circuit from Chame, travelling from Kathmandu or Pokhara through Besisahar. After crossing Thorong La Pass, the usual exit route is Muktinath to Jomsom, followed by onward travel to Pokhara.

Public transport and road conditions can change with the season. The Besisahar–Chame road is rough, and monsoon rainfall can cause closures. Local jeeps also operate between Chame and villages further up the valley.

Flights from Jomsom to Pokhara usually operate in the morning and are often delayed or cancelled by wind. Keep an extra day in your schedule. If flying is not possible, you can travel by road via Beni.

From Pokhara, you can return to Kathmandu by tourist bus (around 7–8 hours) or flight (around 25 minutes).
Tips and Common Mistakes

The biggest mistakes on the Thorong La crossing are rushing acclimatisation, starting too late and relying on outdated permit information. A little preparation can make the difference between a manageable crossing and a difficult one.

What to do:

• Spend an extra day in Manang and take a short acclimatisation hike, such as Ice Lake.

• Attend the Himalayan Rescue Association's altitude talk in Manang.

• Choose Phedi over High Camp if you are unsure about your condition.

• Start around 4–5 AM, aiming to cross before winds typically strengthen later in the morning.

• Carry snacks and water, eat breakfast and keep 1–2 buffer days for weather or altitude-related delays.

• Consider the upper Pisang–Ghyaru–Ngawal route for better views and gradual acclimatisation.

What to avoid:

• Do not rush from Manang to High Camp in one day.

• Never cross during heavy snowfall or whiteout conditions.

• Do not hide altitude sickness symptoms to stay on schedule.

• Avoid alcohol and smoking at altitude.

• Do not rely on ATMs, Wi-Fi or mobile coverage in remote sections.

• Check current permit and insurance requirements before departure.

After the pass, you can continue to Muktinath and Jomsom, then travel towards Pokhara by flight, bus or jeep. You can also extend the trek towards Ghorepani and Poon Hill.

Conclusion

Crossing Thorong La Pass is more than just reaching the highest point of the Annapurna Circuit. It is the reward for days of steady walking, proper acclimatization, and respect for the mountains. While the altitude demands preparation, thousands of trekkers successfully cross the pass each year without any technical climbing experience.

Take your time, listen to your body, and follow a sensible itinerary. With the right preparation, Thorong La can become the highlight of your entire Himalayan journey.

Thinking about trekking the Annapurna Circuit? Walk Through Nepal can help you plan a safe and successful crossing with experienced local guides, permit assistance, and itineraries designed for proper acclimatization. Get in touch with our team and start planning your adventure today.

Frequently Asked Questions

How high is Thorong La Pass?

Thorong La Pass sits at 5,416 meters (17,769 feet), making it the highest point on the Annapurna Circuit Trek and one of the highest trekking passes in Nepal.

How difficult is Thorong La Pass?

Thorong La is challenging mainly because of high altitude, cold, a steep ascent, and a long descent, not technical climbing. Properly acclimatized and prepared trekkers can cross it without mountaineering skills.

Do you need a guide to cross Thorong La Pass?

As of 2026, Nepal strongly enforces licensed guides across major trekking regions including the Annapurna Circuit. Verify current rules before departure, but plan on hiring a licensed guide for safety and legal compliance.

Should I stay at Thorong Phedi or High Camp?

Thorong Phedi (~4,450m) offers a lower sleeping altitude for safer acclimatization but a longer crossing day. High Camp (~4,850m) shortens summit day but increases altitude exposure. Choose based on how you feel.