Trekking in Nepal is safe for most well-prepared walkers. The real dangers are altitude sickness, falls, bad weather and stomach bugs, not crime, and nearly all of them can be managed with a sensible itinerary, a licensed guide, the right insurance and a clear plan for emergencies. This guide covers the rules as they stand in October 2026 and the practical steps that keep trekkers out of trouble.
Key facts: trekking safety in Nepal (2026)
| Topic | What you need to know |
|---|---|
| Guide rule | Since 1 April 2023, foreign trekkers in most national parks and conservation areas are officially required to trek with a licensed guide booked through a registered agency. The Everest (Khumbu) region has a local exemption. Enforcement elsewhere has been patchy, but plan on the rule applying. |
| Restricted areas | From 22 March 2026, a single trekker can obtain a Restricted Area Permit (for example Manaslu, Upper Mustang, Nar Phu), but still only through an agency and with a licensed guide. |
| Biggest health risk | Altitude illness (AMS, HAPE, HACE), usually above 2,500 m. |
| Ascent rule | Above 3,000 m, raise your sleeping altitude by no more than about 500 m a night and take a rest day for every 1,000 m gained. |
| Insurance | Must cover trekking to your maximum altitude and helicopter evacuation. Check the altitude limit in writing. |
| Emergency numbers | Police 100, Tourist Police 1144 (toll-free), British Embassy Kathmandu +977 1 4237100. |
| Safest seasons | Mid-September to November and March to May. The monsoon (roughly June to September) brings landslides and floods. |
| UK government advice | The FCDO says independent trekkers must use a local guide or porter in national parks and protected areas, and warns about helicopter rescue scams. |
Is trekking in Nepal safe?
Every year, many thousands of people walk Nepal’s main trails, such as the routes to Everest Base Camp, Annapurna Base Camp and Poon Hill, and the vast majority come home with nothing worse than tired legs. The teahouse network means you sleep in lodges, eat cooked food and are rarely more than a few hours from other people.
Serious incidents do happen, though. Most come from a small set of causes: climbing too fast, ignoring symptoms of altitude illness, falls on steep or icy ground, walking in bad weather, getting lost when walking alone, and illness from contaminated water. Petty crime on the trails is uncommon, and violent crime against trekkers is rare.
The rest of this guide is organised the way risk actually builds up: decisions made before you fly, then the hazards on the trail, then what to do if something goes wrong.
Before you go
1. Understand the guide and permit rules
On 1 April 2023 the Nepal Tourism Board stopped issuing TIMS cards to independent trekkers. Since then, foreign trekkers in most national parks and conservation areas, including the Annapurna and Langtang regions, have officially had to trek with a government-licensed guide arranged through a registered trekking agency.
The picture on the ground is less tidy:
- Everest region: the Khumbu Pasang Lhamu Rural Municipality decided in 2023 that guides are recommended but not compulsory. Trekkers buy the municipality’s entry permit (NPR 3,000, about £15, since July 2024) plus the Sagarmatha National Park fee (NPR 3,000, about £15).
- Annapurna and Langtang: the rule exists, but checks have been inconsistent, and some independent trekkers still walk these routes. That does not make it legal, and it may affect your insurance if something goes wrong.
- Restricted areas: places such as Manaslu, the Tsum Valley, Upper Mustang, Nar Phu and Dolpo have always required an agency and a guide. Until March 2026 they also required at least two trekkers. A Department of Immigration change that took effect on 22 March 2026 lets a single trekker get the permit, but the guide and agency requirements remain.
Rules in Nepal change often and are sometimes announced at short notice. Check them with your agency in the weeks before you travel. Whatever the legal position, we recommend a licensed guide for anyone trekking at altitude for the first time. A good guide will spot the early signs of altitude illness, knows where the safe shelters are and can organise a rescue in Nepali.
2. Choose a trek that matches your fitness and experience
Many problems start with a trek that is too big, too high or too fast for the walker. A five-day Poon Hill trek tops out at 3,210 m. Everest Base Camp reaches 5,364 m, and the Annapurna Circuit crosses the Thorong La at 5,416 m. These are very different undertakings.
If you have never trekked before, read our guide to trekking for beginners and consider a lower trek first. Our trekking in Nepal hub compares the main routes by length, altitude and difficulty.
3. Get travel insurance that genuinely covers trekking
Standard travel insurance often excludes trekking above a set altitude, typically somewhere between 2,000 m and 4,500 m depending on the policy. If you trek higher than your policy allows and need a helicopter, you may be personally liable for the bill, which can run to several thousand pounds.
Check these points in writing before you buy:
- Maximum altitude: it must be higher than the highest point of your trek. For Everest Base Camp, Kala Patthar or the Thorong La, look for cover to at least 6,000 m.
- Helicopter rescue and medical evacuation: this should be named explicitly, including evacuation to Kathmandu and repatriation home.
- Conditions: some policies require you to trek with a licensed guide or registered agency. Make sure your trip complies.
- 24-hour assistance line: save the number and your policy number in your phone, on paper, and with your guide and agency.
- Pre-existing conditions: declare them all.
Helicopter operators in Nepal usually want a payment guarantee before they fly, either from your insurer or as a deposit. Keep all receipts, medical reports and flight details for your claim. Our guide to travel insurance for trekking goes into more detail.
4. See a doctor or travel clinic six to eight weeks before you go
There are no compulsory vaccinations for entering Nepal from the UK, but a travel nurse or GP can advise you based on your health and itinerary. Common recommendations include making sure routine vaccines are up to date, plus hepatitis A and typhoid. Rabies, hepatitis B or Japanese encephalitis are sometimes advised, depending on your plans. NHS-linked sites such as Fit for Travel and TravelHealthPro have up-to-date country pages.
Talk to your doctor if you have heart or lung disease, high blood pressure, diabetes, sickle cell disease, are pregnant, or have had altitude illness before. Some conditions make high-altitude trekking unwise, and others just need planning. The appointment is also the right time to discuss whether acetazolamide (Diamox) is suitable for you. More on that below.
5. Get fit, and practise on hills
Fitness does not protect you from altitude sickness, but it does make every day safer. Fit trekkers are less tired, less likely to stumble on descents and better able to turn round when they need to. Build up to back-to-back days of five to seven hours with a loaded daypack.
6. Pack the right kit and a proper first aid kit
Kit failures cause real problems at altitude. Common examples are boots that give blisters, a jacket that is not waterproof and a sleeping bag that is not warm enough. Use our free trek packing checklist, and choose footwear carefully with our guide on how to choose trekking shoes.
Your guide should carry a group first aid kit, but bring a personal one too. A sensible personal kit includes:
- Blister care: plasters, blister dressings and zinc oxide tape
- Painkillers such as paracetamol and ibuprofen
- Oral rehydration salts
- Anti-diarrhoeal tablets, plus any antibiotic your doctor has prescribed for travellers’ diarrhoea
- Throat lozenges (the dry, cold air causes the “Khumbu cough”)
- Antiseptic wipes, a small bandage, sterile dressings and tweezers
- Sun cream (SPF 50) and lip balm with SPF
- Water purification tablets or a filter
- Your personal medicines, with spares in a separate bag
- Acetazolamide, only if prescribed for you
- A head torch and a foil emergency blanket
7. Tell people where you are going
Leave your itinerary, agency contact, guide’s name and insurance details with someone at home, and agree when you will check in. Mobile coverage (Ncell and Nepal Telecom) now reaches many trekking villages, and most lodges sell wifi, but expect gaps in deep valleys and at high camps. Register your trip with your agency, and consider a satellite messenger for remote routes.
Altitude sickness: the number one risk
As you climb, each breath contains less oxygen. Your body adapts over days, a process called acclimatisation. If you climb faster than it can adapt, you can develop altitude illness. It can affect anyone, whatever their age or fitness, and it can start above about 2,500 m, or occasionally lower.
The three forms of altitude illness
| Condition | Main symptoms | What to do |
|---|---|---|
| AMS (acute mountain sickness) | Headache plus one or more of: nausea, loss of appetite, fatigue, dizziness, poor sleep | Stop ascending. Rest at the same altitude until symptoms clear. Descend if they worsen. |
| HAPE (high altitude pulmonary oedema) | Breathlessness at rest, dry then wet cough, chest tightness, extreme tiredness, blue lips | Medical emergency. Descend immediately, and use oxygen if available. |
| HACE (high altitude cerebral oedema) | Severe headache, confusion, loss of coordination (unable to walk heel to toe in a straight line), drowsiness | Medical emergency. Descend immediately, with help. It can be fatal within hours. |
How to prevent it
The Wilderness Medical Society’s guidelines, widely used by doctors who advise trekkers, are the best evidence-based starting point:
- Go up slowly. Above 3,000 m, increase the altitude you sleep at by no more than about 500 m per night. Many trekkers find 300 to 500 m comfortable.
- Build in rest days. Take one for every 1,000 m of height gained, for example in Namche Bazaar and Dingboche on the way to Everest Base Camp.
- Climb high, sleep low. Walking a few hundred metres higher on rest days and then descending to sleep helps acclimatisation.
- Avoid flying or driving straight to high altitude. Sleeping above 3,500 m on your first night puts almost everyone at high risk.
- Drink to thirst, eat well and avoid alcohol and sleeping pills at altitude, as they can mask symptoms or depress breathing.
The most important rule: never go higher with symptoms of altitude sickness, and descend if they get worse. A good guide will turn a group round, so let them.
Acetazolamide (Diamox)
Acetazolamide is a prescription medicine that speeds up acclimatisation and lowers the risk of AMS. It is not a substitute for a sensible ascent rate. Side effects include tingling fingers and toes, more frequent urination and making fizzy drinks taste flat. It is unsuitable for some people, including some with a sulfonamide (“sulfa”) allergy.
See your doctor or a travel clinic to decide whether it is right for you and at what dose. Do not buy it over the counter in Kathmandu and self-medicate. Our article on altitude sickness on the Everest trek goes deeper into symptoms, oxygen saturation readings and acclimatisation days.
On the trail
Water safety
Do not drink untreated tap, stream or spring water, however clear it looks. Livestock, trailside toilets and villages all sit upstream. Your options are:
- Boiled water: lodges sell it, and it is reliable once fully boiled.
- Purification tablets or drops (chlorine dioxide is effective against bacteria, viruses and most protozoa).
- A filter or UV purifier: filters do not remove viruses unless they are rated as purifiers, so combine them with tablets if in doubt.
- Refill stations: treated-water stations operate in many villages on the Annapurna and Everest trails, and are cheaper and greener than plastic bottles.
Bottled water is safe if the seal is intact, but it costs more the higher you go, and empty bottles are a growing waste problem in the mountains. At altitude you will lose more fluid than you expect, so aim for regular drinks through the day and carry oral rehydration salts.
Food hygiene and sanitation
Stomach upsets are the most common illness on Nepal treks. Reduce the risk by:
- Eating freshly cooked, hot food. Dal bhat (rice, lentils and vegetables) is fresh, filling and usually refilled for free.
- Being cautious with meat on higher trails, where it may have been carried up for days without refrigeration.
- Avoiding salads and peeled fruit you have not peeled yourself.
- Washing or sanitising your hands before every meal and after every toilet stop.
Lodge toilets are often squat toilets, and many have no running water or soap, especially in cold months when pipes freeze. Carry hand sanitiser, wet wipes and a small roll of toilet paper, and pack used paper out where there is no bin.
Weather and seasons
Mountain weather changes fast. A clear morning can turn into afternoon cloud, rain or snow, especially at higher altitudes. Check the forecast every day with your guide or lodge owner, start early, and aim to be at your lodge by mid-afternoon.
| Season | Months | Main safety considerations |
|---|---|---|
| Autumn | Mid-September to November | Most stable weather and busiest trails. Late-season storms are possible, and the October 2014 storm killed dozens of trekkers and guides around the Thorong La. |
| Winter | December to February | Very cold nights. Snow and ice can close high passes (Thorong La, Cho La, Larkya La). Some high lodges close. Microspikes are often needed. |
| Spring | March to May | Good conditions and warmer. Afternoon cloud and showers increase in May. There is avalanche risk in some gorges after heavy winter snow. |
| Monsoon | June to mid-September (approx.) | Heavy rain, landslides, floods, leeches, slippery trails and frequent flight cancellations (including Lukla). Rain-shadow areas such as Upper Mustang are drier. |
For month-by-month detail, see our guide to the best season to travel in Nepal.
Landslides, floods and the monsoon
The FCDO warns that travel in the monsoon can be hazardous, with floods and landslides cutting off towns for days. Since roads now reach many trailheads, landslides are as much a risk on the drive as on the trail. If you trek in the monsoon or just after it:
- Cross landslide-scarred slopes quickly, one person at a time, without stopping, and watch the slope above.
- Do not cross swollen streams. Wait, or turn back.
- Avoid walking or driving in or just after heavy rain.
- Build spare days into your itinerary so you are never under pressure to push on.
- In wet months, use leech socks or gaiters and check your legs at rest stops. See how to avoid leeches while trekking.
Avalanches and rockfall
Avalanches are rare on standard teahouse routes, but they do happen. They are most likely after heavy snowfall, in late winter and spring, and in narrow valleys below steep slopes. The section of the Annapurna Base Camp trail between Deurali and Machhapuchhre Base Camp is a known avalanche path. Lodges and guides will advise when it is unsafe, and you should take that advice even if it costs you a day.
Yaks, mules, porters and suspension bridges
Trails in Nepal are working roads. Yak, mule and donkey trains carry supplies, and a loaded animal will not step aside for you.
- Always step to the uphill (mountain) side of the trail and wait for animals to pass. Standing on the outer edge risks being knocked off.
- Do not start crossing a suspension bridge if animals are coming the other way. Wait at the end until they have crossed.
- Do not touch or photograph animals at close range without asking the herder.
- Give way to porters carrying heavy loads, especially on steps.
Everyday trail hazards
Most trekking injuries are simple slips and twisted ankles, particularly on descents. Use trekking poles, take your time going downhill, and avoid walking after dark. On cold mornings, stone steps and streams can be icy. Do not walk off-trail for photos near drops.
Solo trekking: risks and rules
Solo trekking is now restricted across most of Nepal by the 2023 guide rule. The main area where foreigners can still legally trek without a guide is the Everest (Khumbu) region. The FCDO discourages solo trekking.
The risks of walking alone are practical rather than criminal. If you twist an ankle on a quiet section of trail, develop HACE and become confused, or take a wrong turn in cloud, nobody may notice for hours. Several trekkers have gone missing on Nepal’s trails over the years, often while walking alone.
If you trek with minimal support in the Khumbu, reduce the risk:
- Stick to the main teahouse trails and tell your lodge each morning where you are going.
- Walk with other trekkers on quiet or high sections, and never cross passes alone.
- Carry a satellite messenger or personal locator beacon.
- Know the signs of altitude illness, and descend at the first sign of HAPE or HACE.
Scams to know about, especially helicopter rescue fraud
Nepal’s best-known trekking scam involves helicopter rescues. Problems were first flagged in 2018. In March 2026, prosecutors in Kathmandu charged 32 people, including people linked to helicopter operators, hospitals, trekking companies and rescue services. The case involved claims of more than US$19 million (about £14.7 million). The alleged practices included staging or inflating evacuations for minor illness, billing several insurers for one flight, faking medical records and paying commissions between companies. Earlier reports alleged that some trekkers were deliberately made ill. The FCDO specifically warns about guides calling in expensive helicopter evacuations and taking a cut.
None of this means you should refuse a genuine evacuation. HAPE and HACE kill, and helicopters save lives. It does mean you should:
- Book through a reputable, registered agency, and be wary of trips that are much cheaper than the market rate.
- Contact your insurer’s emergency assistance line yourself before (or as soon as) a rescue is arranged, so they can authorise and coordinate it.
- Ask what the diagnosis is, what your oxygen saturation reading is, and whether walking down is an option.
- Be wary of anyone pressuring you to evacuate for mild symptoms, or after an unusual bout of food poisoning.
- Keep copies of all medical notes and bills.
Other things to watch for are unlicensed “guides” touting in Thamel or Lakeside Pokhara, fake or overpriced permits sold by touts, and agencies that cannot show their registration. Licensed guides carry an ID card issued by the Department of Tourism.
What to do in an emergency
- Make the scene safe and keep the casualty warm and sheltered.
- For suspected HAPE or HACE, start descending immediately if it is safe to do so. Even 300 to 1,000 m can make a big difference. Do not wait for a helicopter if you can walk or be carried down.
- Get help: your guide, lodge owner or a nearby health post can organise porters, horses or a helicopter.
- Call your insurer’s 24-hour assistance line with your policy number, location, condition and contact number.
- Contact the authorities if needed (see below), and the British Embassy if you are a UK national needing consular help.
| Who | Number |
|---|---|
| Police | 100 |
| Tourist Police hotline (toll-free) | 1144 |
| Ambulance | 102 (limited reach outside towns) |
| British Embassy Kathmandu (24/7 consular) | +977 (0)1 4237100 |
| FCDO London (24/7) | +44 (0)20 7008 5000 |
Tourist Police have posts on major trekking routes, including Lukla, Namche, Ghorepani, Ghandruk, Dhampus, Chame, Dharapani and Jomsom, plus offices in Kathmandu and Pokhara. The Himalayan Rescue Association runs aid posts staffed by volunteer doctors in peak seasons, including at Pheriche on the Everest trail and Manang on the Annapurna Circuit.
Current FCDO travel advice for Nepal
As of October 2026, the UK Foreign, Commonwealth and Development Office’s travel advice for Nepal includes these points relevant to trekkers:
- Foreign independent trekkers must use a local guide or porter in national parks and protected areas, and solo trekking is discouraged.
- Be aware of mountain hazards all year round, especially above 3,000 m, including altitude sickness, sudden weather changes and avalanches.
- Make sure your insurance covers mountain rescue and helicopter costs.
- Monsoon travel (normally June to October) can be hazardous, with floods and landslides.
- Political protests and strikes are fairly common, can start at short notice and can turn violent. Avoid demonstrations.
- Be cautious about unusually cheap trekking deals and helicopter rescue scams.
Advice can change quickly, so read the latest version on GOV.UK just before you travel and sign up for email alerts. For broader travel tips, see our things to know before travelling to Nepal.
Trekking safety checklist
- Trek booked through a registered agency with a licensed guide (and permits arranged)
- Insurance covering trekking to your maximum altitude plus helicopter evacuation
- Travel health appointment done, and a decision made about acetazolamide with your doctor
- An itinerary with no more than about 500 m sleeping gain per night above 3,000 m, and rest days
- Spare days built in for weather and flight delays
- Water purification and a personal first aid kit packed
- Broken-in footwear and proper waterproofs
- Itinerary, guide details and insurance number shared with someone at home
- Emergency numbers saved in your phone and on paper
- The latest FCDO advice checked the week you fly
Conclusion
Nepal’s trails are some of the most rewarding and well-supported in the world, and the risks are well understood. Go slowly at altitude, trek with a licensed guide, buy insurance that genuinely covers where you are going, treat your water and keep your plans flexible. Do those things, and the chances are your biggest worry will be how sore your legs feel after the descent.
If you would like help choosing a safe, well-paced itinerary, our Everest Base Camp trek includes licensed guides and built-in acclimatisation days, or you can start planning your trip with us.
Frequently asked questions
Is it safe to trek in Nepal?
Yes, for most people who prepare well. The main risks are altitude sickness, falls, weather and stomach illness rather than crime. Trekking with a licensed guide, climbing slowly and having insurance that covers helicopter rescue removes most of the danger.
Do I need a guide to trek in Nepal in 2026?
In most cases, yes. Since 1 April 2023 foreign trekkers have officially needed a licensed guide booked through a registered agency in most national parks and conservation areas, including Annapurna and Langtang. The Everest (Khumbu) region has a local exemption. Restricted areas such as Manaslu and Upper Mustang always need a guide, although since 22 March 2026 a single trekker can get the permit.
Can you trek solo in Nepal?
Legally, only in a few places, mainly the Everest region, where the local municipality does not require a guide. Elsewhere, the guide rule applies. Even where it is allowed, walking alone carries risks if you are injured, get lost or develop altitude illness, so tell your lodge your plans and never cross high passes alone.
What altitude does altitude sickness start in Nepal?
Altitude sickness usually starts above about 2,500 m, and occasionally lower. Above 3,000 m, limit the gain in your sleeping altitude to about 500 m per night, and take a rest day for every 1,000 m gained. Never go higher with symptoms.
Should I take Diamox for trekking in Nepal?
Acetazolamide (Diamox) can help prevent acute mountain sickness, but it is a prescription medicine with side effects, and it is not suitable for everyone. Discuss it with your GP or a travel clinic before you go. It does not replace a slow ascent.
Does travel insurance cover helicopter rescue in Nepal?
Only if your policy specifically includes it and covers trekking to the altitude you will reach. Many standard policies stop at 2,000 to 4,500 m. For Everest Base Camp or the Annapurna Circuit, look for cover to at least 6,000 m, with helicopter evacuation named in the policy wording.
What is the emergency number in Nepal?
Dial 100 for police and 1144 for the toll-free Tourist Police hotline. Ambulance is 102, but it has limited reach in the mountains. UK nationals can call the British Embassy in Kathmandu on +977 (0)1 4237100 at any time. On a trek, your guide and your insurer’s assistance line are usually the fastest route to help.
Is it safe to trek in Nepal during the monsoon?
It is riskier. From roughly June to September, heavy rain causes landslides, floods, slippery trails and flight cancellations, and the FCDO warns that monsoon travel can be hazardous. If you go, choose rain-shadow areas such as Upper Mustang, build in spare days and avoid walking or driving in heavy rain.
