The shield is capped by an area of vents which has many overlapping craters, and is elongated in shape.

At the southern end lies the youngest of the craters which has a lava dome within it.

Sacabaya has a diameter of 8 kilometres (5.0 mi) and rises 360 metres (1,180 ft) to the summit; the edifice is covered by material produced during explosive activity.

The summit contains a north-south row of several pit craters, each with a diameter of about 1.5 kilometres (0.93 mi), and one of which contains a lava dome.

The volcano may be of Holocene age and is presently fumarolically active (GVP).