The main trekking seasons are generally spring and autumn.
Spring brings warmer temperatures, blooming rhododendrons and good mountain views. Autumn is popular because of generally stable weather, clear mountain scenery and comfortable trekking conditions.
Winter can be suitable for lower-altitude routes, while some high-altitude trails become considerably more challenging because of snow and cold temperatures.
The difficulty depends on the route.
Shorter routes such as Poon Hill can be suitable for travelers with limited trekking experience, while destinations such as Everest Base Camp, Annapurna Circuit and Manaslu require more preparation.
Remote and high-altitude treks require careful planning because weather, altitude and transportation can affect the itinerary.
A basic trekking packing list usually includes:
Comfortable trekking shoes
Warm layers
Waterproof jacket
Sleeping bag
Backpack
Water bottle
Sunglasses
Sunscreen
Headlamp
First-aid supplies
Personal medications
Trekking poles
Warm hat and gloves
The exact equipment depends on the altitude and season.