Turn off the main road at S67766 42279 A, taking care when near this point as its easy to miss the turn off.
The forest entrance,S68218 41485 B, can be locked so you may need to park(space for 2 cars) and walk. At S68848 40961 C cross a stile to your right and follow a rough track next to a stone wall uphill.At S69243 40632 D turn right up the track to the summit.
The summit has a large rusting metal cross from 1984, a cairn, a hut and a pillar that locates and names features visible on the surrounding landscape. Linkback: https://mountainviews.ie/summit/423/comment/5182/

According to PW Joyce [Irish Local Names Explained] Brandon Hill is named after St Brendan the Navigator. It is an isolated peak around 12k SE of the Blackstairs. Like the Blackstairs it is mainly made of granite. Like other isolated peaks, the views from Brandon hill are well known for quality, so good in fact that someone has put a direction indicator near the summit. To the NE are the Coppanagh Hills (365m) reputedly interesting for a short walk, though from the map it would appear that the trig pillar on Coppanagh is now in a wood.
The photo shows a night view of the cairn on the summit with its trig pillar, taken from near the direction indicator. The night was relatively clear and on the original picture there are various astronomical objects clearly visible. The square outline on the left is a concrete block house. Paul Clements [The Height of Nonsense] suggests sort of eponymously that "It's the Temple of Zodiac .. It's where you meet old friends before you come to the World's End down there at Nova Villa Pontis" (This was part of the name of a bridge in Newross built in the 12th century. No, no, I don't understand the allusion either.)

A more prosaic suggestion is that the 13m cross on the summit had lights which in turn needed power, a generator and housing. Linkback: https://mountainviews.ie/summit/423/comment/764/

I elected to tackle Brandon Hill from the south. Leaving the R705, I turned right onto the laneway at S 718 379 E, a location marked on sheet 68 as Ballinvary Irish. It's quite easy to miss this, so keep a look out for a small lane that almost doubles back on itself as you turn off the main road. Follow this track (not recommended for low-slung vehicles!) to the forest gate at S 710 379 F, where there's space for one or two cars to park. I then followed the forest tracks (accurately shown on sheet 68) to approach the summit from the south. You pick up some markers labelled "BW" (Brandon Way?) as you make your way through the forest; these will accompany you all the way to the summit. Views from the top are excellent; although not the highest of peaks, its relatively isolated position commands a stunning panorama. Linkback: https://mountainviews.ie/summit/423/comment/2422/

Approaching Graiguenamanagh by car from the east going across the bridge through the narrow streets and on to a big car park on the right before the roundabout. Walked up to the roundabout from the car park and turned left as per the sign for Inistogue. Turned right at the top of the hill and immediately left and its straight up all the way. Follow the sign marked by a cross when you get to a junction well above the last houses, ie: straight ahead. Took me an hour and three quarters to walk to the top of Brandon from the centre of Graiguenamanagh but I was pushing it. Great views. You can see a town towards the south.probably New Ross. It was a beautiful day. Linkback: https://mountainviews.ie/summit/423/comment/6299/

This visualisation looks broadly north east and shows how Brandon Hill is a good place to see the whole of the ridge of the Blackstairs some 10 km away. Data from NASA and dated 2000. Linkback: https://mountainviews.ie/summit/423/comment/1188/