Segara Anak Lake

Segara Anak Lake is a large volcanic crater lake at about 2,000 meters elevation inside the caldera of Mount Rinjani in Gunung Rinjani National Park on Lombok Island, West Nusa Tenggara. Covering approximately 11 square kilometers, the crescent-shaped lake was formed by volcanic activity and contains the active cone Gunung Barujari. Known for its turquoise waters, natural hot springs and dramatic caldera walls, it is a major trekking destination and culturally revered site.

Visitors can expect a remote high-altitude crater lake set within the steep caldera walls of Mount Rinjani at around 2,000 meters above sea level. The lake features turquoise-blue water, a small active volcanic cone (Gunung Barujari) in its center, pebbly and rocky shores, and nearby natural hot springs (Aik Kalak) where trekkers can soak. Access is only by strenuous multi-day trekking via Senaru or Sembalun routes, with camping areas along the crater rim and lakeshore, panoramic views of the caldera, and opportunities for photography and fishing.