The practical layer

Which routes are worth flying, what they cost, how the dual-pricing system works, and the safety record travellers ask about.

What "covered to 6,000 m" actually means, why helicopter evacuation is the clause that matters, and how to check a policy before you buy it.

Visa on arrival rules, costs, extensions and the handful of nationalities that need to apply in advance.

Which network to buy, what data costs, how far coverage reaches up the trekking valleys, and what Wi-Fi costs above Namche.

Which permit you need for which route, what each costs, where to get them, and the guide requirement that changed in 2023.

A tested packing list for a 12–14 day teahouse trek to 5,545 m, with weights, what to hire in Kathmandu, and what to leave behind.

How acute mountain sickness develops, the acclimatisation rules that prevent it, and the point at which the only treatment is descent.