• Altitude: 6,455 feet (1,967 meter) to 8,160 feet (2,487 meter) via 6,916 feet (2,108 meter)
• Time taken: 5-6 hours trek. One hour 12 km drive to Taluka, 12 km trek to Pauni Garaat
• Trek gradient:  Smooth climb for preliminary 3 kilometers. After that there is a nonstop hike and descent all over the trail.
• Water sources: You can refill your water bottles in the river along the trail.

There is a four-wheel-drive street that interfaces Sankri with Taluka. Trekkers with Treks and Trails drive from Sankri to Taluka (12 km, 60 minutes). Since, the excursion is long, we start as ahead of schedule as possible in the first part of the day. After breakfast we board a SUV and drive through a forest road. The drive is very rough. The vehicle crosses a couple of streams in transit. We arrive at Taluka in about 60 minutes. Taluka is a tiny parish with solid houses, couple of shops and two Government visitor houses. This is rather distinctive from the design fashion in nearby hamlets like Sankri, Osla and Gangad, which are near 300 years timeworn.

This is where the actual trek starts from on a gravel-strewn trail. The climb is outstanding, going past a progression of wild roses, irises, and bamboo, chestnut and cedar trees. The aroma of cedar trees can be sensed about Taluka. Once in a while during winters, or particularly during periods with rather weighty spells of downpour, the way to Taluka might be excessively hazardous for vehicles, as streams stumble into the street and in this way one might be needed to walk a stretch of around 8 km up to Taluka, though it is just in case of heavy rainfall.

We walk along the Supin River spouting through rapids. This spot is favorable for refilling your bottles. Under the shade of pecan, pine and cedar trees, the walk is reasonably pleasurable. In pre-winter we can frequently discover pecans lying around. One must abstain from touching the vegetation on the sides for there are stinging nettle plants here natively known as 'Bichhu ghas' which exactly means 'scorpion grass'. A slight touch can give a stinging sensation which goes on for around twenty to thirty minutes. This grass is used as a spice and is likewise cooked as a vegetable and eaten. High up above on the left, we get the opportunity to gaze at the town of Datmir. It is lined by an arrangement of step ranches. The ranches have the splendid red hued Cholai developing from late rainstorm to early fall.

The trail traverses a couple of streams which converge with Supin River. Following a couple of long stretches of walk, the settlement of Gangad can be seen towards the left, over the Supin River. One can spot a yellow throated marten in the backwoods of this region. We can likewise discover eatable fruitlets of sea buckthorn. They are orange in hue and propagate in packs. Likewise, known as 'leh berries', the delicious and acrid organic buds are a rich source of Vitamin C. We continue our trek and soon we reach the secluded campsite at Puani Garat.

Today we start the day by heading up towards Osla village, which is located on a sloping spur about a hundred meters above the river Supin. The initial trail to Osla is the steepest section along the entire trek and can take 30-40 mins to cover. The landscape surrounding Osla is full of terraced farms. The colors of these lands differ in every season. The red farms of Cholai (Amaranth) look amazing and can be seen from late monsoon. This grain is a powerhouse with its rich nutritional values and a favorite among the locals. Apart from these Kidney beans in wide varieties are cultivated in the area. Osla is the last village on the route to Har ki Dun. From Osla the trail gradually rises higher and we cross a few fields, while the river can be seen far below. We come across a temple some distance below the trail towards the right. We pass through bushes of flowers like orchids, fleece flowers and sunflowers.
The journey today is rather short, which gives the opportunity to acclimatize to the high altitude and prepare for the next days journey. We can take a breather basking in the sun at the beautiful campsite of Kalkatidhar. The ban to camp at Har Ki Dun has had a rather positive outlook to the trekking itinerary, as it allows for more comfort & at the same time preserves the natural beauty of Har Ki Dun.

The days trek can be considered to be rather long as we today visit Har Ki Dun and Marinda Tal, a small lake formation due to the obstructing boulder across the river stream, which lies 2 KM further ahead of Har Ki Dun. As we start the trek, at a short distance a hidden and roaring waterfall is encountered with a small tea shop beside the waterfall.

The ascending path climbs high above the confluence of Supin river and the river from Ruinsara valley. From near this confluence, we get a view of the snow-clad peaks of Ruinsara valley including Black Peak, the highest peak in the region. While towards north we can see the Har Ki Dun valley far in the distance. We can even spot the Forest hut at Har ki Dun from this point. After traversing higher up along the true right of the river, we enter the final stretch which is inside a forest. The forest opens up into the main camping area of Har ki Dun, right beside the gurgling stream. This is a very panoramic spot in Har ki Dun located at the junction of two valleys, one originating from Jaundhar glacier and the other from beyond Hata glacier. Higher up towards the North we can spot the Forest Rest House, while the wood crafted GMVN guest house lies further up in the distance. The Har ki Dun peak stands tall right in front of us behind the Forest Rest House. Towards its left, Hata peak which is usually snow covered can be seen. The minor ridge to our right, lined with a few scattered Himalayan birch trees Bhojpatra separates us from the massive Har Ki Dun valley that goes up all the way to the base of Swargarohini Peak. The paper like bark of these trees was used in ancient times to write religious scriptures.

The vast open meadows following the course of the Supin river can be explored. Further ahead of the meadows one can walk among the forests of Bhojpatra trees (Himalayan birch) or get a closer glimpse of the Jaundhar glacier and Swargarohini peak, for which we will have to head updwards the Har Ki Dun valley, towards the Swargaroini peak in the eastern direction.

We can choose to relax and soak in the environment for some time or we can continue our trek to Marinda Tal, in the north, just 2-3 km away from Har ki Dun. The trail is gradually ascending here. It is a small lake formed by a huge boulder obstructing the river which flows down from the base of the Borasu Pass.

After our short visit to Marinda Tal we make our return journey back to Kalkatidhar. We take the same route and it becomes much easier as its all downhill from here. We reach back by early evening and rest at the campsite.

The journey back to Osla is an easy walk. On the route we come across a good view of the trail all the way to Osla and see the valley descend towards Taluka, around the curve of the ridge where the two streams comng from Har Ki Dun and Ruinsara respectively, converge. A little short of this intersection we can get a glimpse of a trail to our left marked by a sight of a bridge down over the stream. This trail goes to join the trail to Ruinsara lake and is rarely taken. After reaching Osla, one can roam about in the village, talk to locals and soak in the Garhwali culture. We continue our journey from here to our earlier campsite of Puani Garat where we can spend time basking in the sun.

• Time taken: 4-5 hours, 12 kilometer, 1 hour drive
• Trek gradient: Easy. Descending trail and flat walking.
• Water sources: You can top off your bottles from the streams along the trail

Promptly in the first part of the day, we leave the campsite of Pauni Garaat and trek till Taluka. The walk is downhill and henceforth takes lesser time than last time. We stroll to the left of the River Supin until we at long last show up at Taluka, from where a vehicle returns us to Sankri. We resign for the day in camp close by the stream or in a visitor house in Sankri.

Time Taken:  8 hours’ drive

The trek to Har Ki Dun ends today as we bid adieu Sankri and reach Dehradun by late afternoon.