The Hochsimmer is a volcanic cone, 587.9 m above sea level (NHN),[1] in the Eifel Mountains in Germany.

Flowing past its western foot roughly from north to south is part of the middle reaches of the Rhine tributary, the Nette.

Through its valley runs the Landesstraße 83, which links Weibern to the northwest with Mayen to the southeast.

About 600 metres southwest of the summit is the Kleiner Simmer (514.7 m).

From its viewing platform there is a view of the Eastern High Eifel, the Middle Rhine Basin and of Ettringen; in good visibility, even Cologne Cathedral may be seen.