Gelgia (Romansh, German: Julia) is a river in the Grisons canton, eastern Switzerland. It is a tributary of the Albula, which it meets in Tiefencastel. The road to the Julier Pass runs through the Sursés (German: Oberhalbstein), like the major valley of the Gelgia and its side valleys are called.
| Gelgia | |
|---|---|
 Piz Platta (3392m a.s.l.) in the south-west as seen from Sur | |
| Location | |
| Country | Switzerland |
| Physical characteristics | |
| Mouth | Albula |
• coordinates | 46°39′45″N 9°34′23″E / 46.6626°N 9.5730°E |
| Basin features | |
| Progression | Albula→ Hinterrhein→ Rhine→ North Sea |
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