Bodanrück (lit. 'Bodan rise') is the 112 km (43 sq mi) wide peninsula that divides Lake Constance (Bodensee) into Überlinger See (part of Obersee) and Gnadensee, which is part of Untersee. At its southern end, it reaches the Seerhein, which links Obersee with Untersee.
It is bordered by the island of Mainau to the east and Triboldingerbohl and Reichenau Islands to the west. The Markelfinger Winkel separates it from the Mettnau peninsula. The nature reserve Wollmatinger Ried lies at the southern shore of Bodanrück. Mindelsee is a small lake located on the peninsula.