The Schwarze Grat between Eschachthal in the Bavarian county of Oberallgäu and Bolsternang in the Baden-Württemberg county of Ravensburg is 1,118 m above sea level and thus the highest mountain in Ravensburg, in the province of Tübingen and the Adelegg range, although within the Adelegg region it is topped by the Ursersberg. An observation tower, the Schwarzer Grat Tower stands at the summit.