Zolota Lypa approximately serves as an eastern boundary, while to its west is located the Sian-Dniester Divide Plain.
The southern boundary of Opillia is created by Dniester, while to the north it reaches Lviv Plateau (Roztochia), Holohory, and Peremyshliany Highlands.
The general elevation here is around 350–400 m (1,150–1,310 ft) and in contrast to the rest of Podillia landscape in the region is more smooth and gentle.
Their watersheds are cut by secondary valleys which provide the region with a hilly terrain.
The slopes of the hills are covered with forests (generally beech, oak, and elm), and the watersheds with fields and meadows.