The caterpillar lives on grasses (Festuca, Nardus etc.).
Erebia ottomana inhabits grassy but partly also gappy embankments, alpine meadows and rocky slopes from 1200 to 2400m above sea level (mostly 1400 to 2000m). It often appears in forest edge situations and is found mainly as a nectar guest in damp habitats and tall herb communities.
The moths fly from late June to August with an peak in July. The caterpillar lives hibernating from August to early June.
Erebia ottomana is distributed disjoint. It occurs on the one hand in the French Massif Central on some mountains (own observations on Mont Lozčre). It is also found in Northern Italy at the Monte Baldo. But it is more common in the southern Balkans (Albania, Macedonia, Bulgaria, Greece).