Rosenegg, Mountain summit in Rielasingen-Worblingen, Germany.

Rosenegg is a forested hill of volcanic origin in the Hegau region, about 1.5 km west of Rielasingen-Worblingen and just east of the Swiss border. Its summit is rounded and uneven, with dense stands of bare and evergreen trees and a band of pale, leafless trunks near the crest. The hill rises behind open fields and tilled land. Its hard Rosenegg-Deckentuff contains green-black bronzite, and the phonolite cone is exposed only in a few places.

Rosenegg is a volcanic phonolite cone whose hard cover tuff contains green-black bronzite. On its slopes stand the ruins of Rosenegg Castle and a wall fortification, with a farmstead and inn in the former outer bailey. A transmitter now also occupies the hill.

The name Rosenegg refers to the hill itself, and the slopes hold the ruins of Rosenegg Castle and a wall fortification. In the area of the outer bailey (Vorburg) stand a farmstead and a guesthouse, so the hill is still worked and visited rather than abandoned.

The mountain is accessible via several hiking trails that start from nearby parking areas and suit different fitness levels. Wear appropriate footwear and follow the trail markings carefully, particularly when weather conditions change or visibility is poor.

The hill is a Phonolite cone, a volcanic rock type exposed at only a few spots. Its Rosenegg-Deckentuff is very hard and carries green-black bronzite, a mineral visitors would not expect in this landscape. The summit also holds a transmitter station.