A seasonal stream originates at springs in Bungendore Park near the south-eastern corner of the suburb, and takes the name Cooliabbera Creek from the property on which the southern watershed is located. This creek flows out of a steep sided valley in the escarpment. It runs parallel to Leys Rise, just outside the southern boundary of the suburb, and joins the stream from Dead Man's Gully just north of the intersection of Eleventh and Rowley Roads, after which it discharges into the Wungong Brook.