Rothenbrunnen (Romansh: Giuvaulta) is a municipality in the Viamala Region in the Swiss canton of the Grisons .

Rothenbrunnen is first mentioned in 1472 as Hof Juvalt. In 1572 it was mentioned as zum Roten Brunnen.

Rothenbrunnen has an area, as of 2006, of 3.1 km2 (1.2 sq mi). Of this area, 11.6% is used for agricultural purposes, while 67.7% is forested. Of the rest of the land, 9.4% is settled (buildings or roads) and the remainder (11.3%) is non-productive (rivers, glaciers or mountains).