A One Adventures

Borasu Pass Trek

Borasu Pass Trek

  • Dehradun Sankri to Chitkul


(Dehradun Sankri to Chitkul)
Service Tax @ 5% (GST)

Borasu Pass divides Uttarakhand from Himachal Pradesh. The pass is located only a few kilometers from the Tibet border. The east part of the Borasu area comes out from Tons valley and the north-west part is merged with Baspa valley. Its north-west range comes down on Jhukia Glacier. The nearest village, Chitkul, is 20.3 km (12.6 mi)away from the pass.

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  • Overview
  • How To Reach?
  • Things to carry
  • Cancellation Policy
  • Expectations

Brief Description

Every year lots of trekkers from around the world come for Har Ki Dun trek. It is one of the most beautiful all season treks. However, very few know that if you continue on the same trail further, you can cross into Himachal. The pass which you will be using to do so is known as “Borasu Pass“. It connects Tons Valley in Uttarakhand with Baspa Valley in Himachal. Trek to Barasu Pass offers the true promise of adventure. It is considered a strenuous trek, with pass located at a high altitude of 5360 M. The trek starts from Lovely “Taluka” Village and goes via villages of Gangaad, Dhatmir, Seema and Osla until Har Ki Dun. The trek passes through dense forests consisting of chestnut, walnut, willow and chinar trees. The trek from Osla to Har-ki-doon is through terraced mountain fields, lush green grassy patches, and thick coniferous forests The trail from Har ki Dun to Chitkul (In Himachal) covers all kinds of landscapes that may require the use of some technical equipment too. Being on the border of Indian Himalayas the pass is very close to Tibet. The Borasu Pass trek is meant for experienced trekkers only due to its taxing trail, boulder sections, multiple glacier crossings infested with crevasses, steep ascents and descents. The best months for the Borasu Pass Trek is May, June, Late-September and October. Stay on this page for more information on the Borasu Pass Trek.

Trek Itinerary

Day1: Dehradun to Sankri Drive 7/8 hr drive 190 km

We start early from Dehradun and reach Sankri village by evening. Govind is the final stretch through Pashu National Park after crossing a check post at Netwar. We spend the night relaxing in a guest house or camps.

Day 2: Sankari (1,920 m) to Border (2,560 m) via taluka (1,820 m) 1 hour drive 5-6 hours hike: 14 km

After breakfast we are taken from Sankari to Taluka. The drive is a bit bumpy. The trek starts from the taluka on the path. It is quite pleasant to walk along the Supin River, walking through rapids with us, under the shade of walnuts, cedars and other trees. Often the passing villagers greet us on the way.

The path crosses over some streams which merge with Supine. After a few hours' walk, Gangad village can be seen across the river to the left. We continue our hike and after about an hour's walk, the quaint village of Osla reveals itself. The border opposite Osla to the river is a small settlement. We camp here or live in a hut with a local family in the village.

Day 3: Har ki Doon peak taken from Kalakatidhar Har ki Dun Peak - May; PC: Arnab Seema / Osla to Har ki Dun (3,510 m) 4-5 hours hike: 10 km

From Osla the trail gradually rises and passes through flowering bushes such as orchids, wool flowers and sunflowers. The ascending path rises above the confluence of the river from the Supin River and the Ruinsara Valley.

After going upstream to the left of the river, we camp at a very picturesque location at Har Ki Doon, at the junction of two valleys - one originating from Jaunsar glacier and the other beyond Hisar glacier.

Day 4: Har ki dun to Ratha tho (4,200 m) 4-5 hours hike: 5 km

Today we trek at a moderate speed to reach Ratha Tho. On Vasi, we pass through Morinda Tal, which is a small lake. A portion of the trek is little more than a boulder, but with a view of snow-capped peaks and wide valleys, it is a scenic walk.

Day 5: Rath Tho Borsu Pass Base Camp (Upper Lamjung) (4,900 m) 3-4 hours hike: 4 km

On this day, we move to a higher level. There are boulders on the path and often covered with snow. The campsite in Upper Lamjang is also mostly on ice. From here one gets a beautiful view of the valley behind.

Day 6: Bonga (4,000 meters) from Borsu Pass Base Camp (Upper Lamjung) to Bonsu Pass (5,360 m) 7-8 hours hike: 8 km

We start before sunrise for this day's trek. As we keep going up, so do the thoughts behind us. After crossing two glaciers and one final climb on the boulder, the Borasu-shaped cradle is in front of us. We descend towards the Himachal of the pass in a large glacier which usually appears on the initial slope. The trek ahead is along the tributary of the BSP River. We can find shepherds near the campsite.

Day 7: Bong to Chitkul (3,430 m) 8 hrs. hike: 15 km

Today's trek takes about 8 hours. It is an easy walk through flowering fields and forests. Overnight in Chitkul village. The trek ends here. One can get public or private transport to Shimla from Chitkul or Sangla.

By Air:-
Jolly Grant Airport, Dehradun is the nearest airport from Sankri but it is about 200 kms far from base camp. After your landing at Dehradun, you can travel the further journey with your trekking company by road.

By Train:-
Like the airport, Dehradun  is also the closest metal road to this trek. Further distance will have to be covered by the road to reach Bhradsar lake.

By Bus:-
After reaching Dehradun, you can catch a direct bus to Sankri from Massoorie bus stand which is just adjacent to the Dehradun railway station but before 8 am. However, you can also book the taxi to Sankri village or you can contact your trekking company to assist you.

Basics Gears

• Backpack & Rain Cover (40-60 Litres)
• Trekking Shoes
• Trekking Pole
• LED Torch
• One Water Bottle (one litre)
• Basic Medications (or prescribed if any)

• Trekking Jacket
• Three (Five in winter) Warm Layers
• Two trek pants (one Wear and one carry)
• Two collared t-shirts
• Thermals

• Sunglasses
• Sunscreeen Lotion (SPF 50/70)
• Lip Balm (SPF 30)
• Sun cap
• Synthetic hand gloves
• Two pair of Socks
• Raincoat/Ponchos

• Daypack (20 litres), if you opt to offload your backpack
• Toiletries
• Cutlery
• Plastic cover (for wet clothes)

Mandatory Documents
Original and photocopy of government photo identity card- (Passport, Aadhaar Card, Driving license or voters ID)

Cancellation requests are available to taken over the phone.

In case you wish to cancel your trek please e-mail us at :
1- Cancellations up to 21 days prior to departure date – 70% refund
2- Between 21 days to 14 days prior to departure – 50% refund
3- Between 14 days to 10 days prior to departure- 30% refund
4- Less than 10 days of departure – No refund or you can transfer your trek (same batch date & same trek) to your dear one.

a) Change of trek batch date is dependent on the availability of seats in the batch.
b) In case of transferring a trek to your dear one, he/she should satisfy all the mandatory requirements lay down by Trekkaro.
c) Trek The Adventures holds the right to change/cancel the policies, without prior notice.

Refund Policy:
The applicable refund amount will be processed within the 10 working days.

We are the best to provide all the services we have. In fact, our wish to excel goes beyond the point where your boots hit the trail – it begins the moment that you get in contact with us, and it never ends. We have greatly appreciate the hikkers who connect with us. “Trek The Adventures” Blessed Always best for you.

Your Expectations

• Safety
Of course, this is a non-negotiable. Safety is embedded in our business and it’s something that we take very seriously in all our treks. It’s the primary reason we’re very popular in just a year.

• Personalized Service, Care, and Attention to Detail
For some organizations, this is, surprisingly, negotiable. But it isn’t for us. After safety, if we can do one thing right, every time, it’s to ensure that we sweat the small things.

• The Best Guides
If you are already trekking with us, then you’d be forgiven for thinking our guides are superhuman. It doesn’t mean feat to entertain, cook, guide and facilitate, but for our guides, they handle it with grace and all the while the attention is on you.

• The Best Itineraries
It takes a lot of refinement to make a perfect trek, from dawn to dusk there are a LOT of moving part and potential for things to go awry. From last one year, we’ve balanced on the tight rope of offering the right amount of activity, flexibility and trek time. Whilst utilizing the best lodgings in the most unique places.

• Value
We’re not in the business of making money and provide you nothing. Our treks aren’t expensive, they represent excellent value for money and for those seeking to maximize their time, there is no better way.

Our Expectations
It may come as a surprise, but the reality is that it is a two-way street (or trail), you are ultimately responsible for the nature of the experience that you have with us. And not only that, but you also have an influence on the experience of others’ in your small group.

• Attitude
This is your vacation, and the attitude that you bring will set the tone for your experience. We get that at times it’s difficult (we plan to challenge you) and we get that at times it’s a bit uncomfortable (this is not a cruise trip). All we ask you to keep an open mind, a big smile on your face and readiness for the unexpected.

• Physical preparedness
Our treks are designed for everyday people. You definitely don’t have to be an athlete, but to be fair for yourself and your group members, you do need to be ready. Worried about it? Do not stress it, our team is 100% dedicated to helping you pick the right trek, bring the right gear and be physically and mentally prepared.

• Know who’s in charge
As we’ve mentioned, you rightly expect when you join our trek to be in good, safe hands. For us to ensure the entire group’s safety, we suppose you, as our guest, to listen to your lead guide. They are the expert when it comes to decisions made on the trek.





Purola has the last ATM point before you reach Sankri (Basecamp) if you need to withdraw money.

Purola is the last place before you reach Sankri (Basecamp) where you’re likely to get a stable mobile signal and at Mori, you’re likely to get Jio Network only. This is about 2 hours before Sankri, the base camp. Finish all your important phone calls here and inform anxious family members about limited phone connectivity.


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Customer Reviews

Kedarkantha winter trek, Uttarakhand

Rated 5 out of 5
December 27, 2022

Trip was amazing. It is an unforgettable trip. Staff was superb and friendly. Especially thanks to Bijju bhai and Anil bhai. They done excellent job. They provide tasty food and good accommodation. I enjoyed a lot with this team. I decided to go along with this group in future trek also.

Avatar for Bonda Srinivasa rao
Bonda Srinivasa rao

Kedarkantha Trek

Rated 4 out of 5
February 19, 2021

Best people to with on any kind of treck.

Avatar for Nitish

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