Koto is the village on the Annapurna Circuit where the trail to the restricted Nar Phu valley branches off from the main circuit route, marking the entry checkpoint for trekkers heading into the culturally distinct villages of Nar and Phu. Set in the upper Marshyangdi valley below Chame and Manang, Koto serves as an important logistical junction, where permits for the Nar Phu extension are checked before trekkers commit to this more remote and demanding side trip.

The village itself is modest, primarily functioning as a gateway rather than a destination, with basic teahouses catering to trekkers either continuing on the standard Annapurna Circuit route or turning off toward the restricted Nar Phu valley, one of the more culturally rich and visually dramatic extensions available anywhere on the wider circuit. The Nar Phu valley beyond Koto is considerably less developed than the main Annapurna Circuit trail, requiring a minimum of two trekkers and additional permits reflecting its more sensitive, historically isolated status.

For trekkers who choose to make the detour, Koto represents the last point of relatively straightforward infrastructure before the trail narrows into a dramatic high-desert canyon leading toward Meta, Phu, and eventually the technical Kangla Pass that rejoins the main circuit further along near Ngawal. This makes Koto a genuine decision point on the Annapurna Circuit, where trekkers with the time and inclination can choose a considerably richer, more adventurous version of an already celebrated trek.

Facilities along this stretch of trail remain simple, and trekkers should carry sufficient cash, since cards are not accepted and ATMs do not exist beyond the larger towns.

Mobile signal in the area is patchy at best, and travellers should not rely on constant connectivity once they are this far into the trail network.

Weather at this elevation can change quickly, and a flexible itinerary with a buffer day or two is generally recommended for anyone travelling through this part of the route.