Hvítserkur, also known as Röndólfur, is an ignimbrite mountain in the Eastfjords of Iceland. It is not to be confused with the popular sea stack bearing the same name on the Vatnsnes peninsula in the North.
Located near Borgarfjörður Eystri, the ridge presents a unique visage of colour, streaks cutting across its façade, and a smattering of basaltic layers. The mountain is said to be the result of a very high intensity volcanic explosion.
