Tonnachau Mountain

Tonnachau Mountain is a summit on Weno Island that rises about 340 meters above the surrounding terrain. Its ridge contains traces of ancient fortifications and settlement layers that extend from the slopes to the highest points.

The mountain shows archaeological evidence of human settlement dating back to 4,000 years ago, concentrated on its ridge. During World War II, Japan built military fortifications on its slopes and used the location for strategic defense of the area.

In Chuukese tradition, the mountain is remembered as the site where a legendary leader built a fortress to watch over the lagoon below. Local people connect this place to early Pacific voyaging routes and settlement patterns of their ancestors.

The climb requires good physical fitness and sturdy footwear due to steep, rocky paths and wet conditions. It is wise to hire a local guide who knows the best routes and can assist with safety matters.

On the summit and slopes, remnants of bunkers and gun emplacements from World War II are still visible, appearing almost forgotten amid the natural setting. These military structures tell a completely different story than the archaeological layers beneath them.

GPS coordinates: 7.45690,151.84958

Latest update: December 14, 2025 20:31