Thorong La is a 5,416 m glaciated saddle between Yakawa Kang (6,482 m) and Khatung Kang (6,484 m) in the Damodar Himal, and it is the highest point on the Annapurna Circuit. The crossing is one long day: up from Thorong Phedi (4,450 m) or High Camp (4,880 m), over the 5,416 m saddle, then down 1,616 m to Muktinath (3,800 m). Most groups leave camp between 4:00 and 5:00 a.m., reach the pass three to five hours later, and spend another three to four hours dropping to Muktinath on legs that are already tired.
Thorong La needs no rope, crampon or climbing experience in normal autumn or spring conditions, and trekkers sometimes underestimate the day for exactly that reason. Cold, gale-force wind and thin air at close to half the sea-level oxygen level make the crossing hard, not the terrain, and altitude sickness poses a bigger risk here than a fall does. Every stage of a well-planned Annapurna Circuit itinerary, from the Manang rest day to the High Camp versus Phedi decision on day 6, builds toward this single saddle.
High Camp or Thorong Phedi: where to start
Sleeping at Thorong Phedi (4,450 m) or pushing on to High Camp (4,880 m) sets up the whole summit morning. High Camp shaves roughly 430 m and an hour off the dawn climb, but that gain comes from sleeping 430 m higher, which can worsen headaches and disrupt sleep before the hardest day of the trek. Thorong Phedi trades a longer, colder morning for a better night's rest.
| Option | Sleep altitude | Climb to pass | Trade-off |
|---|---|---|---|
| Thorong Phedi | 4,450 m | ~966 m, 4-5 hr | Better sleep, longer cold morning |
| High Camp | 4,880 m | ~536 m, 3-4 hr | Shorter climb, higher and harder night |
We sleep at Thorong Phedi with most groups, unless a trekker is acclimatising well and sleeping soundly already, because a solid night matters more than saving an hour on the climb. Either way the alarm rings early: the Annapurna Circuit itinerary places this crossing on day 7 of our standard 14-day route, right after the Manang rest day has done its work.
The climb and descent profile
From High Camp the trail gains 536 m through a series of false summits, switchbacking up frozen scree in the dark before daylight reveals the true saddle. Prayer flags and a small tea shack mark the top, a broad, exposed shelf where lingering in the wind costs body heat fast. The descent then drops 1,616 m to Muktinath over three to four hours, and this is where trekking poles earn their weight, saving knees on loose, steep switchbacks.
- Start: 4:00 to 5:00 a.m. from High Camp or Phedi, head-torch on.
- To the pass: 3 to 5 hours, false summits, no water above camp so carry 1.5 to 2 L.
- At the top: 5,416 m, photos, then move; do not sit and cool down.
- Descent: 1,616 m to Muktinath, loose footing, poles essential.
Fatigue catches up on the way down, not the way up, and most injuries on pass day are twisted ankles or battered knees from the last two hours of descent. Pacing matters as much going down as going up, and a guide who keeps the group together is what stops a single stumble from turning into a rescue.
Weather, wind and timing
Wind is the defining hazard on Thorong La, building steadily through the morning and often reaching gale force by early afternoon. That timing, not daylight, is the real reason for the pre-dawn start: by 9 or 10 a.m. wind chill can push the felt temperature on the saddle well below minus 15 C in autumn.
Snow can shut the pass completely, and the clearest example is 14 October 2014, when the remnants of Cyclone Hudhud dumped roughly 1.8 metres of snow around Thorong La, Manang and Mustang in about 12 hours. Avalanches and exposure in that storm killed around 43 trekkers and guides, Nepal's worst trekking disaster on record, and it reset how seriously agencies treat a bad forecast before pass day. A guide's decision to hold a group at Phedi or High Camp for an extra day traces directly back to that lesson.
Autumn (late September to November) gives the most stable window, with clear mornings and the lowest snow risk, as our best time for the Annapurna Circuit guide explains. Spring (March to May) works too but carries more leftover winter snow early in the season. Crossing in January or February, deep winter, works only with settled weather and full winter gear, and the pass can simply be closed for days at a stretch.
Gear for the crossing
Cold-weather kit matters even in peak season on this crossing, because the day starts in the dark at minus 10 C or colder and takes hours to warm. Layering does the work: a base layer, an insulated mid layer, a windproof shell and a down jacket for the summit, plus warm gloves, a hat and a buff. The table below is the minimum kit we check before a group leaves camp.
| Item | Why it matters |
|---|---|
| Down jacket | Summit cold and wind chill below minus 15 C |
| Windproof shell + warm gloves | Gale-force wind on the pass |
| Trekking poles | 1,616 m descent to Muktinath |
| Head-torch + spare batteries | 4 a.m. start in the dark |
| Microspikes (seasonal) | Snow or ice on the approach |
| 1.5-2 L water + snacks | No resupply above High Camp |
Microspikes are the item people forget most often, and the one they need most after fresh snowfall, when the frozen switchbacks above camp turn to glass. Our altitude sickness prevention guide covers the medical side of the day that no amount of gear can fix.
Acclimatisation before the pass
Two nights at Manang (3,540 m) plus a climb-high, sleep-low acclimatisation day make the 5,416 m crossing survivable. Red blood cell production takes days, not hours, and no level of fitness shortcuts that biology. Trekkers who reach Thorong Phedi already sleeping badly and nursing a headache are usually the ones who struggle on summit morning.
| Stage before the pass | Altitude | Role |
|---|---|---|
| Manang night 1 | 3,540 m | Arrive, rest |
| Manang acclimatisation day | up to ~4,600 m hike | Climb high, sleep low |
| Yak Kharka | 4,050 m | Gentle gain |
| Phedi or High Camp | 4,450-4,880 m | Final night before pass |
Each of these four stages buys margin for summit morning, and our itinerary protects all of them rather than compress the schedule to save a day. Skip one and the pass stops being a hard walk and becomes a gamble.
What the pass day feels like
The first hour out of camp, still in the dark, is the low point of the day: cold, slow, your body fighting to wake up at altitude. As light comes, the false summits tease you upward, each one looking like the pass until the prayer flags finally appear on the true saddle at 5,416 m. The feeling at the top is real, but the descent to Muktinath is still ahead, and the work is only half done.
Eating during the three-to-five-hour climb is hard, since altitude kills appetite, but it is exactly what keeps legs working for the descent ahead. Small sips and snacks every hour beat forcing down a full meal at the pass. Pacing, not power, carries trekkers over Thorong La: steady walkers reach the saddle while fast starters fade halfway up. Hold a rhythm you could sustain for hours and the pass arrives sooner than the clock suggests.
Safety and failure points
Inadequate acclimatisation and a late start are the two most common failure points on pass day, and both come down to planning rather than fitness. Trekkers who skip the Manang rest day or push through a worsening headache are usually the ones who turn back below the saddle or need help crossing it. Our Manang acclimatisation guide covers the single best preparation for this day.
A guide carrying a pulse oximeter, a stocked first-aid kit and the judgement to turn a group around is what separates a hard day from a dangerous one on the Annapurna Circuit Trek. Our guides check oxygen saturation twice daily from Manang onward, and if a reading drops below 80% at 4,500 m or symptoms of HACE or HAPE appear, descent starts immediately, even in the dark. No road reaches the pass, so if something goes wrong the only options are a slow assisted descent or a helicopter, so travel insurance with helicopter evacuation cover is non-negotiable, not optional paperwork. Respect the weather window and the altitude, and the crossing stays a tough but achievable day.
What lies on the far side at Muktinath
Muktinath (3,800 m) is the reward at the bottom of the descent: a temple complex sacred to both Hindus and Buddhists, set against the dry Mustang landscape. Its 108 water spouts and eternal flame draw pilgrims year-round, and arriving on foot over the pass carries a weight the jeep road from Jomsom never will. Most trekkers reach it drained but elated, with the hardest day of the circuit finally behind them. The contrast between the icy pass at dawn and the warm, dusty courtyard by afternoon is one of the sharpest the Himalaya offers in a single day.
From Muktinath the circuit's character changes fast: the trail drops into the Kali Gandaki valley, through the apple orchards of Marpha and the Tibetan-influenced villages of lower Mustang. Many groups fly out from Jomsom (2,720 m) the next day, or take the jeep to Pokhara along the same windy valley road.
Cross Thorong La with a tested plan
Annapurna Trekking crosses Thorong La with two nights at Manang, a Phedi-or-High-Camp call made on the day itself, and a guide who reads the weather before committing the group. Founder Ajay Kumar Shrestha and the TAAN-certified team have led more than 1,000 trekkers over this pass and know exactly when to go and when to wait a day. See the Annapurna Circuit Trek page or contact us to plan a safe 2026 crossing.
