Starting at O0135522458 A, Parking at entrance gate walk approx 400m bearing 25 deg true until track sweeps around to the right.Take this route until the track takes another turn to the left after approx 180m.This track then leads to the mast covered 395m summit.
Nice views to the NW and a couple of overgrown passage tombs (O0176123072 B and O0196222974 C) are found near the summit. Linkback: https://mountainviews.ie/summit/848/comment/5607/

Saggart Hill (Slievethoul), with its bristling array of masts like quills on the back of a porcupine, is the westernmost of the Dublin Mountains. It’s a somewhat neglected place, no doubt, but it responds well to a bit of interest. Starting from the forest entrance at O 024 235 D, a track circles the hill and comes close to the summit on its southwestern side, with an access route leading up.

The hill doesn’t only give fine views of the plains of Kildare to the west and the rolling mountains to the east of Brittas and Blessingon. It also provides a glimpse of the past. To begin with, you find yourself walking here, not on Leinster granite, but on clayey deposits, sandstone, siltstone and shale, laid down at the end of the last glacial period along the rim of the midland ice sheet, where its meltwaters, together with those of the glaciers descending from the mountains to the east, formed a great lake, far bigger than the present Pollaphuca Reservoir. Who knows if Brittas Lake, of which there is a good view from Saggart Hill, is not a tiny remnant of the original lake, as some would suggest? The OS Map does identify a bushy island there as an age-old crannóg, but other accounts I have read say the lake was only created in the 19th century to form a head of water for mills on the Camac River, which flows on to meet the Liffey just downstream of Heuston Station. Paper and even gunpowder mills once used this watercourse in Clondalkin.

Another glimpse of the past comes from the numerous megalithic monuments that dot Saggart Hill and its northward prolongation, Knockananiller and Knockandreenagh. The passage grave on Saggart Hill itself is overshadowed now by a big mast but is still readily visible as an overgrown mound, which seems to mark the highest spot on the flat summit. The central chamber has been disturbed but the inner walls are discernible, as are two large kerbstones on the south side. It’s sad to see the legacy of the past pushed aside in this way by technocracy, but at least, as a 2006 study would assure us, radiant energy on the hill is within safe limits, so walkers can probably examine the megalith without fear of being fried! Linkback: https://mountainviews.ie/summit/848/comment/4405/

Having read wicklore's comments on Saggart Hill, I was greeted by the sight shown in the photo accompanying this comment when I parked at the suggested spot (whose co-ordinates should be O 013 225 E rather than N). Safe to say, I wasn't expecting much, but Saggart Hill had a few surprises for me. Firstly is the view. While the summit area is littered with masts and other networking paraphernalia, the tree felling means that there are some great views over west Dublin and Kildare. The other thing I wasn't expecting was a herd of deer (see my other comment). Linkback: https://mountainviews.ie/summit/848/comment/3491/

We took our 10 week old daughter on her first outing to the hills today. Our dogs joined us to share the occasion. We chose Saggart Hill, as a handy forest track leads to the summit area which we could push the buggy along. It is still the same ugly place as before, with evidence of car bonfires at the forestry entrance, random debris in the trees and a mini telecommunications city at the summit. However by turning our backs on the summit buildings it was possible to enjoy the part of the summit that is grassy and 'wild'. Views across to the Dublin/Wicklow range are restricted by forestry, but Seahan was visible. It is actually from the forestry entrance that the best views of the Dublin/Wicklow hills can be had-all the way south to Silsean and Moanbane, and SE to Mullaghcleevaun East Top and Duff Hill. Little Cupidstown Hill-the highest point in Kildare-is 2kms to the south of Saggart Hill, and is distinctive with its single phone mast sticking out above the forestry at the summit. Our little girl enjoyed her visit to Saggart Hill and brought some new life to this sad summit. Linkback: https://mountainviews.ie/summit/848/comment/3643/

Taking advantage of a half day on this miserable rain-lashed Friday I decided to take a look at Saggart Hill. I was curious why no one had posted a report before, and why only one member had even claimed climbing it. Feeling like a pioneer braving a new frontier I donned my waterproofs and set off.
At Brittas on the N81 (about 10 minutes drive out of Tallaght) I took a right and found my way to the forestry road at O014 225 F (OS map 50). Walking up the forestry road I passed loggers and the inevitable "Do not Climb on Timber Stacks" signs. The rough road led to the top in about 10 minutes. There were three junctions along the track and I simply took the uphill option each time.
My pioneering hopes were dashed as I reached the most industrialised hilltop I have ever seen. At every turn there were masts, transmitters, buildings, spiked fences and, believe it or not, security cameras. I counted about 10 masts of various sizes, enclosed in separate compounds. It was like Ballymount Industrial Estate up there, and I wondered if security staff would appear from the many structures to chase me off.
The summit is relatively flat. It was obviously cleared of forestry in the past to make way for the masts and buildings. I think the bulldozers just pushed everything to the north and east, making the ground there difficult to walk on.
I searched in vain around the hilltop for a redeeming feature, but even the ringfort to the east of the "summit" was a sad affair, barely discernible from the surrounding wasteland. A forlorn looking dead tree stands over it for those of you seeking it.
The views out to the east and south would be great in clear weather. Even with the rain and cloud I could see across to Seahan and Corrig and further south to Sorrell and beyond.
As I left this miserable hilltop I took a route through the trees desperate to find something of interest to report to MV. I found a carefully made scrambler course in the forest and I was glad someone is getting pleasure from Saggart Hill. Linkback: https://mountainviews.ie/summit/848/comment/3284/

On my second attempt at this hill after abondoning first attempt due to a dead horse lying at the entrance to the access road (O013 225 E). Walked on main track which veers to the left (Wrong way) and the right all the way to the buzzing summit. Masts everywhere ruin what has the makings of a nice summit and walk.Thankfully the clear weather allowed for great views all the way across to the hill of Allen in Kildare which made up for the monstrosoty behind the camera. Linkback: https://mountainviews.ie/summit/848/comment/6108/