Munsiyari is a popular trekking destination, and serves as a base to various popular trails. Some of the popular treks in the area include the Khalia top trek, which is a 2-hour trek which rewards one with lush green meadows and traces of snow, and the Thamri Kund trek, which is a much more modest and easier trek.
A number of hotels arrange for these treks and other adventure activities while you can get necessary gear at some local shops.