{{short description|Mountain in Italy}}
{{Multiple issues| {{More citations needed|date=July 2025}} {{No footnotes|date=July 2025}} }} thumb|300px|Lentil and poppy blooming on Piani di Castelluccio. thumb|300px|A summer view of the Monti Sibillini. The '''Sibillini Mountains''', or Sibylline Mountains (Italian: ''Monti Sibillini'') are one of the major mountain groups in the Italian Peninsula, and part of the Apennines range. Most of the peaks are over {{convert|2000|m|ft|abbr=on}}; the highest is Monte Vettore at {{convert|2476|m|ft|abbr=on}}.
Since 1993 the area has been part of the Parco Nazionale dei Monti Sibillini (Sibillini Mountains National Park).
The present-day landscape morphology, predominantly U-shaped valleys and glacial depressions, is due to the action of glaciers during the Quaternary period.
==Wildlife and vegetation== *crested porcupine *Eurasian eagle owl *golden eagle *peregrine falcon *roe deer *viper *wildcat *wolf
The small Lago di Pilato within a deep U-shaped valley below Monte Vettore, is home to a crustacean endemic to this location, ''Chirocephalus marchesonii''.
The area contains stands of beech scattered amongst open subalpine grasslands and meadows maintained by the grazing of sheep.
==See also== *Apennines *Geography of Italy *Monte Ascensione
==Sources== *{{cite book|first=Bernardino|last=Gentili|chapter=Note di Geomorfologia del Parco Nazionale dei Monti Sibillini|title=Collana dei Quaderni scientifico-divulgativi del Parco Nazionale dei Monti Sibillini|publisher=Aniballi Grafiche|location=Ancona|date=April 2002 }}
{{coord|42|49|26|N|13|16|32|E|type:mountain_region:IT|display=title}} {{Authority control}}
Category:Mountain ranges of the Apennines Sibillini Sibillini Sibillini