Altitude is a serious factor on this trek. You climb from road level through the Rolwaling valley to Beding at about 3,700 m and Tsho Rolpa at about 4,580 m, then face Tashi Lapcha at about 5,755 m. Go slowly, use the rest days, drink plenty and descend if symptoms worsen. This is general information, not medical advice, so speak to a doctor before you go.
How the route gains height
The trek begins in warm river valleys and climbs through forest and terraced land toward the Sherpa village of Beding, then up toward Tsho Rolpa and the high basins. After that comes the glacier approach, the pass itself and a descent toward the Thame side. The climb is steady until the lake, then steeper and more concentrated near the pass. Walking times vary with pace and trail conditions, so your guide may change the schedule to match how everyone feels each day. Ask questions of your guide freely, since experienced guides watch group health every day.
Where the nights are highest
The highest sleeping points are the camps near Tsho Rolpa and the lead-in to the pass, which can be well above 4,500 m and close to the glacier. Beding and the lake area give useful stepping stones, but the last nights before the crossing are the demanding ones. Poor sleep is common at these heights and is not by itself a danger sign. Ask us for the night-by-night plan and how many nights above 4,000 m it includes, so you can judge it against your experience. Drink steadily through the day and avoid alcohol while gaining height.
Rest day logic
Rest days are scheduled where adaptation matters, typically at Beding and near Tsho Rolpa. Use them for short walks higher and sleeping lower rather than hard effort. Slow progress and a spare day before the pass often decide whether you cross safely, since weather and snow also affect timing. Do not shorten rest days to save time, and do not rely on fitness alone, because strong trekkers are affected too. We can add a spare day to any plan. Sleeping lower than your highest point of the day is the habit that helps most.
Symptoms and when to descend
Early signs of altitude illness are headache, nausea, dizziness, poor appetite, unusual tiredness and bad sleep. Tell your guide immediately, rest, drink water and do not climb higher while symptoms last. If they worsen, or you notice confusion, clumsiness, breathlessness at rest, a wet cough or severe headache, descend at once. Going down is the first and best response. Never leave someone with worsening symptoms alone, and do not continue to the pass to keep to the schedule. Report small problems early, because they are easier to manage than late ones.
Glaciers, descent and evacuation
A glacier crossing adds hazards beyond altitude: crevasses, rockfall, snow and cold. Your guide and crew manage the route and the equipment, and you should follow instructions exactly. The valley is remote, so descent means walking back toward lower villages, while helicopter rescue depends on weather and communication and is not guaranteed. Travel insurance must cover trekking at this height and rescue flights. Rules and services change, so confirm the details with us before you travel and read your policy carefully. Allow flexible days at the end of the trip, so a delay never forces you to rush.
Common questions
How high is Tashi Lapcha?
The pass is about 5,755 m, which makes it a demanding high crossing with glacier travel. Previous high-altitude experience is strongly advised. Ask us what suits your background.
How high is Tsho Rolpa?
Tsho Rolpa is at about 4,580 m. The nights around it are among the highest on the approach, so they need careful acclimatisation and rest before the pass.
Can altitude affect fit trekkers?
Yes. Fitness helps with walking but does not prevent altitude illness. Pace, rest days and early reporting of symptoms matter more. This is general information, not medical advice.
What if the pass is closed by weather?
Your guide decides whether to wait, try later or turn back. Spare days in the plan make this safer, so allow buffer time at the end of your trip.
