Nepal's transportation is getiing improve day by days. Most of the trekking aera are connected by well paved road and some of road are gravel rough road to get in and out  from trekking. And mostly we in and out by overland. so raod situation in nepal is getting better and you have good drive. So by overland we can in the trek and out the trek.

some of the trekking areas are connected by airport and fly by airoplanes such as LUKLA airport, Jomsong airport, Jhupal, Simikot and Humla airport. So we can fly by airplanes.Mentioned that because of the weather condition some time the flight may cancel. Anyway we can take flight easily to in the trek and out the treks in Nepal.

Opption is only overland or flight because Nepal is Landluck country. So in Nepal we have good enough road to remote areas of trekking routes and flights to mostly in famous trekking areas.