What Are the Most Common Mistakes Trekkers Make at High Altitude?

Trekking in Nepal’s Himalayas — whether to Everest Base Camp, Annapurna, or Manaslu — is a life-changing journey. But altitude isn’t just about amazing views. It’s also one of the biggest physical and mental challenges of the trip.

At Base Camp Himalayas, we’ve guided hundreds of trekkers safely through the high passes and base camps of Nepal. Over the years, we’ve seen a pattern of common mistakes that can turn a dream trek into a dangerous or disappointing one.

Here’s what not to do — and how to stay safe, healthy, and on track for the summit.

The number one cause of altitude sickness (AMS) is gaining elevation too quickly.
Symptoms include:

• Headache
• Nausea
• Dizziness
• Fatigue
• Loss of appetite

What to do instead:

• Stick to a well-paced itinerary
• Include acclimatisation days (e.g., Namche, Dingboche)
• Follow the 300–500m per day ascent rule above 3,000m

See our Everest Base Camp Trek Itinerary with proper altitude pacing.

Many trekkers push on despite mild symptoms, hoping it will go away on its own.

This is a serious mistake — AMS can progress into HAPE (fluid in lungs) or HACE (brain swelling), both of which are life-threatening.

What to do instead:

• Rest immediately if you experience symptoms
• Never ascend with symptoms of AMS
• Tell your guide right away
• Descend if symptoms worsen

Altitude causes dehydration faster due to increased respiration and dry air.

What to do instead:

• Drink 3–4 litres of water daily
• Avoid alcohol and limit caffeine
• Add electrolytes or rehydration salts if trekking long hours

Loss of appetite is common at altitude, but skipping meals weakens your body and increases your risk of altitude complications.

What to do instead:

• Eat small but frequent meals
• Focus on carbs, which burn better at altitude
• Keep snacks like energy bars, nuts, and dried fruit in your daypack

Weather changes rapidly at high altitude. Being cold, wet, or overheating can put stress on your body and slow down recovery.

What to do instead:

• Wear layered clothing you can adjust easily
• Invest in a good base layer, down jacket, and waterproof shell
• Break in your boots before the trek
• Protect hands, ears, and face from wind chill and sunburn

Read our guide: What Kind of Shoes Should I Wear for a Base Camp Trek?

Trying to finish quickly or skipping rest days is a common mistake — especially among fit or experienced hikers who underestimate the effect of altitude.

What to do instead:

• Respect the mountain — not your fitness level
• Understand that even the fittest climbers can get altitude sickness
• Trek slowly, take breaks, and enjoy the journey

Some trekkers refuse altitude medication, thinking it’s unnecessary or weakens their body. In reality, Diamox can help prevent AMS when used correctly.

What to do instead:

• Consult your doctor before the trek
• Consider starting Diamox at Namche or Dingboche
• Know the side effects (e.g., tingling fingers, more urination)

Many trekkers assume they won’t need insurance — until they need emergency evacuation. Helicopter rescues in Nepal can cost $4,000–$6,000 AUD without coverage.

What to do instead:

• Get insurance that covers:
  • High-altitude trekking (up to 6,000m)
  • Medical evacuation by helicopter
  • Trip cancellation and delay

Some solo trekkers underestimate how helpful a guide can be at high altitude — not just for directions, but for medical monitoring, pacing, and logistics.
What to do instead:

• Hire a registered local guide through a trusted company
• Trek with a group or support team
• Choose a company that checks oxygen saturation daily (like we do)

Altitude trekking isn’t just physical — the cold, fatigue, isolation, and slow progress can wear you down mentally.
What to do instead:

• Mentally prepare to go slow and take it easy
• Stay positive and flexible with plans
• Trek with people who support and motivate you

The Himalayas are powerful — and so is your body, if you treat it right.

By avoiding these common mistakes, your trek to Everest Base Camp, Annapurna, or any other high-altitude destination will be safer, more enjoyable, and more successful.

At Base Camp Himalayas, we plan every itinerary with safety, pacing, and acclimatisation in mind — so you don’t make these mistakes in the first place.

Contact us to get expert guidance on preparing for your trek.