If there is one excursion that defines a trip to Arunachal Pradesh, it is the day trip to Bum La Pass from Tawang. Perched at roughly 15,200 feet on the India China border, Bum La is not just a scenic mountain pass. It is a place where history, faith, and raw Himalayan beauty meet in a single day’s journey.

This guide walks you through everything you need for a smooth and memorable trip, from permits and the best season to visit, to the lakes and gurudwara you will pass along the way, and what to pack so the cold does not catch you off guard.

12 Mar: Day Trip to Bum La Pass from Tawang

A typical day trip to Bum La Pass from Tawang starts early, usually between 6 and 7 AM, since the road closes by early afternoon due to weather and security protocols. The distance from Tawang town to Bum La is about 37 kilometres, but the drive can take two to three hours because of the steep, winding mountain roads.

Most travellers cover Sangetsar Lake, Nagula Lake, Pangkang Teng Tso Lake, and Gurudwara Teesri Udassi on the same route before or after reaching Bum La. Because the entire circuit sits inside a restricted border zone, you cannot attempt this trip without prior permits and a registered local vehicle. Private cars are not allowed on this stretch, so booking a taxi or a guided tour from Tawang is the only practical option.

A Brief History of Bum La Pass

The word “La” means “pass” in Tibetan, and Bum La has served as a natural trade and travel corridor between Tawang and Tibet for centuries, long before the modern India China border was drawn. Traders, monks, and pilgrims once crossed this route on foot or on mule back, connecting the Monpa communities of Tawang with Tibetan settlements beyond the ridge.

Bum La holds deep historical weight for two reasons. First, it was one of the key battle sites during the 1962 Indo-China war, and the surrounding hills still carry reminders of that conflict. Second, this is the very route the 14th Dalai Lama used in 1959 while fleeing Tibet and entering India, a moment that changed the region’s political and spiritual landscape forever.

Today, Bum La is recognised as one of the designated Border Personnel Meeting points between the Indian and Chinese armies. It also functions as a limited trading point between Arunachal Pradesh and Tibet during certain months, keeping alive a tradition of exchange that goes back generations.

Why Visit Bum La Pass

A visit to Bum La offers something few destinations in India can match: standing at a real international border, guarded by Indian Army personnel, while looking directly into Tibetan territory. Here is why travellers consistently rank it among the top places to visit in Tawang.

• Standing at the actual border: You get to see the boundary pillar and interact with jawans stationed at one of the country’s most remote outposts.
• Layered history: From ancient trade routes to the 1962 war and the Dalai Lama’s crossing, few passes anywhere carry this much historical significance in one spot.
• Untouched Himalayan scenery: Snow-capped ridges, glacial lakes, and open alpine terrain make the drive itself as rewarding as the destination.
• A sense of national pride: Many visitors describe an emotional connection at Bum La that goes beyond typical sightseeing, simply from witnessing the discipline and dedication of soldiers posted here.
• Genuine offbeat travel: Because of the permit requirement and remote location, Bum La still attracts far fewer crowds than most Himalayan tourist spots.

Best Time to Visit Bum La Pass

Weather decides everything at Bum La, so timing your trip correctly matters more here than at most Indian hill destinations.

• April to June: Roads usually reopen after winter snow, though occasional rain and landslides in the later part of this window can delay permits.
• September to November: Widely considered the best time to visit Bum La Pass. Skies are clearer, rainfall is minimal, and road conditions are more predictable, giving you a better chance of an approved permit.
• December to March: Heavy snowfall frequently shuts the pass entirely, and even Tawang town can be hard to reach. Most tour operators avoid scheduling Bum La trips in peak winter.

There is no fixed opening date published every year. The Office of the Deputy Commissioner in Tawang decides day by day, based on current weather and security conditions, so always confirm availability once you reach Tawang rather than assuming the pass will be open.

Transportation to Bum La Pass

Reaching Bum La involves more paperwork than driving, so plan your permits before you plan your itinerary.

1. Get your Inner Line Permit (ILP) first. This is mandatory for all non-resident Indians entering Arunachal Pradesh. You can apply online through the state government’s ILP portal or collect it at entry checkpoints such as Bhalukpong.
2. Apply for the special Bum La permit in Tawang. This local permit is issued by the Office of the Deputy Commissioner and must be countersigned by the Indian Army. It is only available offline once you are physically in Tawang, and it depends on current weather and security clearance.
3. Book a registered local vehicle. Private vehicles from outside the region are not permitted on the Bum La route. You must hire a local taxi, SUV, or join a guided tour arranged through your hotel or a registered operator in Tawang.
4. Start early. Most vehicles leave Tawang between 6 and 7 AM to reach Bum La before the midday cutoff, after which entry is typically restricted.
5. Carry your documents. Keep your original photo ID along with two or three photocopies of your permits, since they are checked at multiple army checkposts along the way.

Foreign nationals are currently not permitted to visit Bum La Pass because of its sensitive location, even though they can visit other parts of Tawang with a Protected Area Permit.

Pro Tip

Spend at least one full day in Tawang before attempting the Bum La trip to let your body adjust to the altitude. Fuel up your vehicle in Tawang itself, since there are no petrol stations beyond the town, and pack snacks and water because the route has no shops or cafes along the way.

Places to visit on the way to Bum La Pass

The drive from Tawang to Bum La is not just a means to an end. Several stunning stops along the same road are reason enough to make the journey, so plan your day around these three highlights.

Sangetsar or Madhuri Lake

Sangetsar Lake, better known as Madhuri Lake, is a serene high-altitude lake formed after an earthquake in 1950 caused a landslide that dammed a mountain stream. The lake earned its popular name after a Bollywood song from the film Koyla, starring Madhuri Dixit, was shot here, and the name has stuck with tourists ever since.

Surrounded by dead tree trunks that rise eerily from the still water and framed by pine covered hills, the lake offers one of the most photogenic stops on the entire route. Most day trips schedule this as the first stop, since reaching it early gives you more time before weather conditions change later in the day.

Nagula And Pangkang Teng Pso Lake

A little further along the route, you will find Nagula Lake and Pangkang Teng Tso Lake (also written as PT Tso Lake), two glacial lakes that are quieter and less crowded than Madhuri Lake but equally beautiful. Maintained largely by the Indian Army, these lakes are known for their calm blue water, surrounding rhododendron bushes in season, and the kind of silence that is hard to find anywhere else.

Birdwatchers and photographers often linger here longer than planned, since the reflection of the surrounding peaks on the still water makes for some of the best images of the entire trip. Because of the challenging weather higher up, many local guides prefer covering these lakes on the return leg rather than on the way up to Bum La.

Gurudwara Teesri Udassi

Carved into the side of a mountain and reached by a steep flight of stone steps, Gurudwara Teesri Udassi is one of the most spiritually significant stops on this route. It commemorates the visit of Guru Nanak Dev Ji, the first Sikh Guru, who is believed to have passed through this location around 1514 during his third Udasi, a spiritual journey that took him toward Tibet, accompanied by Bhai Mardana.

The gurudwara sits at an elevation gain of close to 70 metres from the road, and the climb takes about 15 to 20 minutes. Given the high altitude, expect some breathlessness on the way up. The Sikh regiment stationed here maintains the shrine with genuine devotion, serving hot tea, prasad, and free langar to every visitor, regardless of faith. Many travellers switch to slippers provided at the base to preserve the sanctity of the site, and the view of the lake below from the gurudwara’s platform is worth the climb on its own.

Bum La Pass

After the lakes and the gurudwara, the final stretch of road climbs sharply toward Bum La itself. Once you arrive, you will be issued a token number and directed toward a designated viewing area near the boundary marker, where Indian Army personnel are present at all times.

From here, you can see the Chinese outpost just a short distance away, and on a clear day the view stretches across bare, windswept ridgelines that mark one of the most remote frontiers in the country. Soldiers stationed at Bum La are often happy to share stories about the region’s history and daily life at this altitude, adding a personal dimension that no guidebook can replicate.

Keep your visit brief and orderly, since security protocol governs how long groups can stay near the border point. Photography rules can change depending on current directives, so always check with your guide or the accompanying army personnel before taking pictures. The cold at this altitude is intense even in summer, so most visitors do not linger for more than 20 to 30 minutes at the actual viewpoint.

What to Wear to Bum La Pass

Temperatures at Bum La can drop well below what you would expect from a summer trip anywhere else in India, so dressing correctly is not optional.

• Thermal inners: A full set of thermal top and bottom forms the base layer, even if you are visiting in June or July.
• Windproof and waterproof jacket: Wind at this altitude cuts through regular jackets quickly, so a proper windproof outer shell is essential.
• Woolen socks and sturdy shoes: Closed, grip soled shoes with thick woolen socks help on both the icy patches near Bum La and the stone steps at the gurudwara.
• Gloves and a warm cap: Exposed hands and ears get cold fastest, so carry insulated gloves and a cap that covers your ears.
• Sunglasses and sunscreen: Reflected sunlight off snow and high UV exposure at this altitude can cause discomfort, so pack UV protected sunglasses and a high SPF sunscreen.
• Layering pieces: Fleece jackets or a light sweater under your outer layer let you adjust easily as temperatures shift through the day.

Carrying a small daypack with a bottle of warm water, some dry fruits or energy bars, and a basic first aid kit rounds out your packing list, since there are no shops along the entire route.

Conclusion

A day trip to Bum La Pass from Tawang is easily one of the most rewarding experiences in Northeast India, combining dramatic Himalayan landscapes, layered history, and a rare chance to stand at a living international border. Getting your permits sorted in advance, timing your visit between September and November, and dressing for extreme cold will make the difference between an uncomfortable ordeal and an unforgettable journey. Pair it with stops at Madhuri Lake, Nagula and Pangkang Teng Tso Lake, and Gurudwara Teesri Udassi, and you have a single day that captures the very best of what Tawang has to offer.

FAQs

How far is Bum La Pass from Tawang?

Bum La Pass is about 37 kilometres from Tawang town, though the drive takes two to three hours due to steep mountain roads.

Do I need a permit to visit Bum La Pass?

Yes, you need both an Inner Line Permit for Arunachal Pradesh and a special local permit issued in Tawang, countersigned by the Indian Army.

Can foreign nationals visit Bum La Pass?

No, foreign nationals are currently not allowed to visit Bum La Pass because of its sensitive border location.

What is the best time to visit Bum La Pass?

September to November generally offers the clearest skies and most stable road conditions for visiting Bum La Pass.

Is Bum La Pass open in winter?

Bum La Pass usually remains closed or inaccessible during peak winter months from December to March due to heavy snowfall.

How high is Bum La Pass?

Bum La Pass sits at an elevation of approximately 15,200 feet above sea level.

Can I use my own private car to reach Bum La Pass?

No, private vehicles are not permitted on this route. You must hire a registered local taxi or join a guided tour from Tawang.

Is Bum La Pass safe for senior citizens or children?

Yes, seniors and children can visit with proper acclimatisation and warm clothing, though it is best to consult your driver or guide about comfort at high altitude.