Mt. Rhondda was first climbed in August 1923 by A. Geoffrion, J.W.A. Hickson and Edward Feuz Jr. The party's original intent was the FA of Mount Baker but early on in the ascent they discovered tracks from a different party heading towards Mt. Baker. They decided to continue onto the col between the two peaks where they spotted snow tracks and cairn on the summit rocks of Mt. Baker. With Baker claimed, they turned their attention to Mt. Rhondda which they summitted in the early afternoon after ascending mixed terrain of rock and snow.