Black Rock Mountain, Summit in County Wexford, Ireland

Black Rock Mountain is a summit in the Blackstairs Mountains on the border between County Wexford and County Carlow, rising to 599 meters. It forms the eastern shoulder of Mount Leinster and stands as part of the mountain range that defines this section of Ireland's landscape.

Black Rock Mountain is the terminal peak of the eastern shoulder of Mount Leinster, the northern of the two massifs into which the Blackstairs Mountains are divided; the southern massif is Blackstairs Mountain. The range lies on the Carlow–Wexford border, and the summit reaches 599 m.

The Irish name An Charraig Dhubh Thuaidh means "the northern black rock", a reference to the peak's dark granite. It is the form used on Irish-language maps and in the official placename record, while English-language maps and signage give Black Rock Mountain. The mountain lies on the Carlow-Wexford border, and the Irish name is the one current in County Wexford speech.

Black Rock Mountain reaches 599 m and lies on the Carlow–Wexford border, at the end of the eastern shoulder of Mount Leinster. Approach from the Mount Leinster side of the Blackstairs range; the summit is the northern of the two Blackstairs massifs' terminal peaks. No marked trail is recorded in the sources, so plan navigation on open hillside.

Black Rock Mountain is the terminal peak of the eastern shoulder of Mount Leinster, the northern massif of the Blackstairs range. The range itself splits into two massifs, with Mount Leinster to the north and Blackstairs Mountain to the south, placing Black Rock at the end of the northern group's eastern spur.