The Indian Himalayas span 2,500 kilometers across five states and two union territories, covering portions of Jammu and Kashmir, Ladakh, Himachal Pradesh, Uttarakhand, Sikkim, and Arunachal Pradesh. The region contains over 50 peaks exceeding 7,000 meters, with Kanchenjunga at 8,586 meters marking the third highest mountain in the world on the India-Nepal border. Nanda Devi stands at 7,816 meters as the second highest mountain entirely within the country. Trekking routes range from day walks through pine forests at 2,000 meters to multi-week expeditions crossing passes above 5,000 meters. The Indian Mountaineering Foundation maintains records of permitted routes, restricted areas requiring special permits, and peak classifications based on technical difficulty.
The Markha Valley trek in Ladakh covers approximately 70 kilometers over seven days, passing through villages at altitudes between 3,300 and 4,200 meters before crossing Kongmaru La at 5,260 meters. The route follows the Markha River through a high-altitude desert landscape, with night temperatures dropping to minus 15 degrees Celsius even in summer months. Villages including Skiu, Markha, and Hankar contain Buddhist monasteries and stone houses built without timber due to the absence of trees above 4,000 meters. The trek begins from Chilling, accessed by road from Leh at a distance of 64 kilometers. Water sources are limited to the river and seasonal streams, requiring careful planning for camp locations.
The Hampta Pass trek in Himachal Pradesh traverses 35 kilometers from the Kullu Valley to Lahaul in four days, crossing the pass at 4,270 meters. The route begins in Jobra at 2,900 meters and descends to Chatru at 3,300 meters, dropping through five distinct vegetation zones. Oak and deodar forests below 3,000 meters transition to birch and rhododendron, followed by alpine meadows, then scree slopes, and finally the glacial moraine above 4,000 meters. The Rani Nala stream provides water on the Kullu side, while the Lahaul side remains arid with snowmelt channels. July through September offers the only reliable window for crossing, as snowpack on the northern face persists into June and returns by October.
The Pin Parvati Pass trek connects Kullu Valley with Pin Valley in Spiti over 110 kilometers requiring 10 to 12 days. The pass sits at 5,319 meters between the Parvati Valley and Pin Valley National Park. Trekkers must cross the Parvati Glacier, which extends 3.5 kilometers and requires crampons and ice axes during standard season from late July to early September. The descent into Pin Valley drops 1,500 meters in eight kilometers through loose scree and requires fixed ropes in sections. This route demands previous high-altitude experience, as the nearest motorable road from either side lies at least three days' walk from the pass. The village of Mud in Pin Valley marks the trek's end at 3,800 meters.
The Roopkund trek in Uttarakhand reaches a glacial lake at 4,800 meters containing skeletal remains carbon-dated to the 9th century. The 53-kilometer route from Lohajung requires six days, passing through Wan, Bedni Bugyal, and Bhagwabasa. Bedni Bugyal consists of alpine meadows spanning four square kilometers at 3,354 meters, used by Gujjar herders for summer grazing between May and September. The climb from Bhagwabasa at 4,150 meters to Roopkund gains 650 meters in four kilometers over loose talus and permanent snowfields. The lake measures 40 meters in diameter and freezes solid from October through May. Studies published in Nature Communications in 2019 identified DNA from approximately 800 individuals in the skeletal remains, representing multiple genetic populations and time periods.
The Goechala trek in Sikkim approaches Kanchenjunga from the south, covering 90 kilometers in eight days from Yuksom at 1,780 meters. The route enters Khangchendzonga National Park, a UNESCO World Heritage Site encompassing 849 square kilometers. Trekkers pass Dzongri at 4,020 meters, where views extend across 20 peaks above 6,000 meters. The final approach to Goechala viewpoint at 4,940 meters crosses the lateral moraine of the Onglakthing Glacier. Permits from the Sikkim Tourism Department limit daily entries, with a quota system enforced at checkpoints in Yuksom and Tsokha. Night temperatures at Dzongri drop to minus 10 degrees Celsius in October, while May brings afternoon thunderstorms on 60 percent of days based on meteorological records from the Gangtok station.
The Valley of Flowers trek in Uttarakhand covers 14 kilometers from Ghangaria to the valley at 3,658 meters, designated a UNESCO World Heritage Site in 2005. The valley contains over 520 documented plant species, including 31 endemic to the western Himalayas. Flowering peaks between mid-July and mid-August, when Himalayan blue poppy, brahma kamal, cobra lily, and primula species bloom simultaneously. The park opens June 1 and closes October 5 each year, with entry restricted to daylight hours only. No camping is permitted within the valley boundaries, requiring trekkers to base in Ghangaria at 3,050 meters. The approach from Govindghat involves a 14-kilometer climb gaining 1,270 meters, with porters and mules available at fixed government rates posted at the trailhead.
The Chadar trek follows the frozen Zanskar River in Ladakh for 62 kilometers from Chilling to Zanskar Valley between January and February. Ice thickness varies from 30 centimeters in flowing sections to over two meters in static pools, requiring daily route assessment. Night temperatures reach minus 30 degrees Celsius, with trekkers sleeping in caves along the river at Tibb, Gyalpo, Naerak, and Lingshed. The caves range from four to 15 meters deep and accommodate groups of 15 to 30 people. Ice forms reliably only when daytime temperatures remain below minus 5 degrees Celsius for seven consecutive days, typically occurring between January 10 and February 20. The route becomes impassable during snow, as the river gorge narrows to four meters in sections with vertical walls rising 400 meters. Lingshed village at 3,800 meters contains a 17th-century monastery and remains road-inaccessible for eight months annually.
The Kuari Pass trek in Uttarakhand spans 33 kilometers over six days from Dhak village, reaching the pass at 3,650 meters. The route traverses oak forests between 2,400 and 2,800 meters, where Himalayan langurs and yellow-throated martens inhabit documented territories. Tali Top at 3,350 meters provides views of Nanda Devi, Kamet at 7,756 meters, Dronagiri at 7,066 meters, and Hathi Parbat at 6,727 meters. The British surveyor Francis Younghusband mapped this route in 1905 as part of the Curzon Trail connecting Garhwal administrative posts. Water sources include the Kailash Khal stream and seasonal springs that flow April through November but freeze during winter months.
The Har Ki Dun trek in Uttarakhand follows the Tons River for 47 kilometers from Sankri, reaching the valley at 3,566 meters in five days. The Tons, a tributary of the Yamuna, flows through a glacial valley two kilometers wide flanked by Swargarohini peaks ranging from 6,247 to 6,252 meters. Villages including Taluka and Osla contain timber houses with slate roofs characteristic of pre-1960 Garhwali architecture, before cement construction became standard. Osla's Duryodhana temple contains wood carvings dated to the 14th century based on dendrochronological analysis. The valley serves as base for climbs to Jaundhar Glacier at 4,300 meters, where meltwater forms the Tons headwaters. Black bears and Himalayan tahrs occupy territories between 2,800 and 4,200 meters, with the highest concentration of tahrs documented between Kalkatiyadhhar and Maninda Tal.
The Stok Kangri climb in Ladakh reaches 6,153 meters from a base camp at 5,000 meters established after a two-day trek from Stok village at 3,600 meters. The summit push begins at 2 AM to reach the top by 8 AM, before afternoon winds exceed 50 kilometers per hour. The route follows a scree ridge gaining 600 meters before transitioning to 45-degree snow slopes requiring crampons. Acclimatization schedules recommend three nights above 4,000 meters before the summit attempt, with intermediate camps at Mankarmo at 4,200 meters and base camp. The Indian Mountaineering Foundation classifies Stok Kangri as a moderate snow peak, requiring ice axe proficiency but no technical rock climbing. Success rates documented by Leh-based operators average 65 percent, with altitude sickness accounting for 80 percent of turnarounds.
The Beas Kund trek in Himachal Pradesh covers 16 kilometers from Solang Valley to the glacial lake at 3,700 meters, completing in two days. The lake measures 50 meters across and remains partially frozen until late June. The Beas River originates from this source, flowing 470 kilometers through Punjab before joining the Sutlej. The trail crosses Dhundi at 3,150 meters and Bakarthach meadows at 3,300 meters before ascending the lateral moraine of Beas Glacier. Prayer flags mark the lake's perimeter, installed annually in May by villagers from Solang and Palchan performing traditional water ceremonies. The surrounding cirque contains four unnamed peaks between 5,200 and 5,800 meters with no documented ascents.
The Nanda Devi East Base Camp trek requires special permission from the Indo-Tibetan Border Police, with access limited to 50 permits annually. The route from Munsiyari spans 68 kilometers to Nanda Devi East Base Camp at 4,200 meters, crossing three passes above 4,000 meters. Nanda Devi National Park has been closed to all entry since 1983 to protect degraded alpine ecology, but a buffer zone trek approaches the eastern face. The route passes through Lilam, Bugdiar, and Martoli villages, the latter abandoned since 1998 after glacial lake outburst floods in 1995 destroyed arable terraces. The Gori Ganga river valley narrows to 20 meters in Ralam Gorge, where trail sections are cut into vertical rock faces 300 meters above the river.
The Bhrigu Lake trek from Gulaba near Manali reaches 4,300 meters in two days covering 22 kilometers. The lake remains frozen from November to May, thawing to a depth of three meters in August based on depth soundings. Local belief attributes the lake to the Vedic sage Bhrigu, though no archaeological evidence supports habitation above 4,000 meters in this valley. The trek crosses Rola Kholi meadow at 3,800 meters, where seasonal shepherds graze sheep from June through September. The climb from Rola Kholi to the lake gains 500 meters in three kilometers over grass slopes exceeding 30 degrees. Snow leopard scat and pug marks appear regularly above 4,000 meters, with camera trap data from the Himachal Pradesh Forest Department recording 17 individual leopards in the Pir Panjal Range section containing Bhrigu Lake.
The Sandakphu-Phalut trek on the Sikkim-West Bengal border spans 51 kilometers over five days, traversing the Singalila Ridge between 3,600 and 3,780 meters. The route provides views of four of the five highest peaks in the world: Everest at 8,849 meters, Kanchenjunga at 8,586 meters, Lhotse at 8,516 meters, and Makalu at 8,485 meters. Trekkers walk through Singalila National Park, established in 1986 and containing the highest concentration of red pandas documented in the eastern Himalayas. Villages including Tumling, Kalipokhri, and Sandakphu contain lodges operated under Forest Department permits, with prices fixed annually by the West Bengal tourism authority. The ridge marks the Indo-Nepal border, with boundary pillars placed every 500 meters. Magnolia campbellii trees reaching 25 meters bloom pink in April at elevations up to 3,400 meters, representing the highest flowering trees in the range.
The Kedarnath trek covers 16 kilometers from Gaurikund at 1,982 meters to Kedarnath Temple at 3,583 meters, one of the four Char Dham pilgrimage sites. The temple, constructed from gray stone slabs, survived the June 2013 glacial lake outburst flood that killed 5,700 people in Uttarakhand and destroyed 80 percent of structures in Kedarnath. The Mandakini River rose 15 meters above normal flow, depositing boulders up to four meters in diameter. The trail was rebuilt by 2014 with 22 concrete bridges replacing suspension bridges. Helicopter services from Phata and Sersi operate May through October at government-regulated fares, completing the distance in seven minutes. Pilgrimage season runs from late April to early November, with the temple closing for winter when snow depths exceed three meters. Daily pilgrim counts peak at 35,000 in May based on Uttarakhand police records.
The Dzongri-Goechala trek extension continues from Goechala to Kanchenjunga South Base Camp, adding 24 kilometers and three days to the standard route. The extension crosses Zemathang at 4,600 meters and Thangsing at 3,930 meters before reaching Lamuney at 4,200 meters. Lamuney sits at the terminus of the Onglakthing Glacier, with ice faces rising 600 meters to Pandim Peak at 6,691 meters. Crevasses crossing the glacier route require ropes and crampon experience, with bridge installations maintained by the Sikkim Alpine Club from May to October. The base camp at 4,300 meters lies directly beneath Kanchenjunga's southern wall, which rises 4,200 vertical meters to the summit. Permits for this extension require additional clearance from the Sikkim Forest Department, processed through registered trekking agencies only.
The Rupin Pass trek from Dhaula in Uttarakhand to Sangla in Himachal Pradesh covers 52 kilometers over seven days, crossing the pass at 4,650 meters. The route follows the Rupin River through three distinct geological zones: slate and phyllite below 3,000 meters, granite between 3,000 and 4,000 meters, and schist above 4,000 meters. Waterfall sections at Dhanderas Thach require fixed rope ladders during high flow from June to August. The Rupin waterfall drops 200 meters in three tiers, with trekkers ascending beside the middle tier on a trail cut into the cliff face. Snow bridges across the upper Rupin River remain stable until mid-June, after which ford crossings become necessary. The descent to Sangla Valley drops 2,100 meters in 12 kilometers through rhododendron forests containing 11 species documented in botanical surveys by the Botanical Survey of India.
- [Survey of India: topographic maps and official altitude records at surveyofindia.gov.in]
- [Uttarakhand Forest Department: park permits and trek regulations at forest.uk.gov.in]
- [Wildlife Institute of India: fauna distribution and research data at wii.gov.in]