Kanchenjunga Base Camp Trek in September

The first half of September walks like August. The lower trail from Sekathum through Amjilosa and Gyabla is still very wet, as the tour notes describe for the monsoon, and the forest is thick and green. By the later weeks the same path is drier underfoot, the streams have dropped, and the walk to Ghunsa feels like a different route.

The northern valley rewards a late September departure. Khambachen, Lhonak and Pangpema sit under skies that begin to clear, and a clear morning above the glacier gives the first real look of the season at an 8,586m mountain, the third-highest in the world. The three nights above 4,000m are cooler than in July, but not yet the deep cold of November.

Day 14 depends on the sky again. The three passes are easier to read once the monsoon has gone, and the descent to Tseram at 3,870m is calmer. Oktang on day 15 is the last piece of the route, and it is a better prospect on a clear late-September morning than in any month before it.

September is still quiet. The first autumn trekkers arrive late in the month, but on a route this remote the effect is small, and most teahouses will have few guests. The quiet and the simplicity above Tseram are part of the package.

As autumn begins, more of the route’s season starts to come together. Even so, infrastructure above 3,000m is limited, and a flexible attitude to arrival times serves better than a fixed one.

Access follows the sky. In early September the road days are still exposed to monsoon rain on the run to Taplejung and the drive to Sekathum. After the monsoon withdraws, the same roads settle, and the flight leg to the eastern lowlands becomes more reliable. Keep two spare days if your dates fall in the first half of the month, and one if they fall in the last.