Within its first half, the river flows eastwards through the valley Calfeisen and the reservoir Lake Gigerwald (Gigerwaldsee) until it reaches Vättis at 943 m (3,094 ft), where it is joined by the Gorbsbach and where it turns sharply towards the northeast.

[1] The river then flows through Bad Ragaz before it finally merges with the Alpine Rhine.

[2] Between Valens and the hamlet of Bonadivis, the water of the Tamina digs up to 200 m (660 ft) into the ground.

Over the last 15,000 years, the small river has eaten its way into the rock and, between Valens and Ragol, it is sometimes even completely covered by natural bridges.

[3] Historically, the Tamina Valley (Taminatal, also Vättnertal) was owned by the Pfäfers Abbey, joined to the canton of St. Gallen at its formation in 1803.