Park on the roadside at S112 083 A (Point A) on the Mellary to Newcastle road just after you cross the border to Tipperary and an abandoned farmhouse. There is room here for 5-6 cars.
You will notice there are two tracks running side by side uphill , take the right hand one and follow it uphill and west.
After 0.75 kms follow this track left and around the side of Knockmeal for about 1km.
The track turns left again and slightly downhill to the col with Knocknafallia. You will see a rough heather covered low bank, which I recommend walking to the east side of, skirting Knocknafallia and heading gently uphill towards Knocknagnauv. Follow this bank and though it disappears into the bog on some small sections eventually it becomes quite clear and the stonework appears.After you cross a very boggy,moss covered stream bed the heather will start to thin and you will notice a rough track heading uphill and south west. Follow this for a short distance until it levels out.
Turn southeast then and ascend to the long plateau of Knocknafallia . Linkback: https://mountainviews.ie/summit/158/comment/4918/

Knocknafallia was the site for a proposed wind farm subject to considerable controversy and ultimate rejection in 1999. The view shows Crohan West (left of picture) and the ridge from it extending to Knockmeal (560m) to the right. Between Knocknafallia and Knockmeal you can see some fairly obtrusive roads associated with the forestry to the right, marked as Meoul on the map. Linkback: https://mountainviews.ie/summit/158/comment/397/

Knocknafallia has a broad ridge around 500m in length stretching East-West along the top. This fine ruin of a cairn is on the East end of the ridge. It is somewhat hard to say exactly where the summit actually is. The picture shows the cairn and a smaller cairn in the distance. By my reckoning the summit is around 20m South of this smaller cairn. The mountain in the distance is Knockmealdown (794m) with a ridge extending to the right (North) towards Knockmoylan. Linkback: https://mountainviews.ie/summit/158/comment/398/

Walked to Knocknafallia from Knockmeal on Sunday 18 February to location of stone cairn which includes a passage grave on the eastern side of Knocknafallia. The cairn is located at Irish Grid S 09418 07495 B. The elevation of the cairn is 666 metres. Walked west approximately 400 metres to a higher location which has the elevation of 668 metres, as shown on O.S. Map No. 74 for the high point. The coordinates for this new location were recorded and used to correct our position for it. The attached photo shows some members of the Cork Walkie Talkies Club standing next to some stones left by previous walkers at the high point. Linkback: https://mountainviews.ie/summit/158/comment/19858/

Coming from Knockmeal, the col between the two mountains takes you down to about 500 metres, so it's a 166 m slog at 45 degrees or worse the rest of the way up to Knocknafallia. I would have to agree with the others regarding the uncertainty of where the true summit of Knocknafallia actually is. The summit location recorded by MV is stout-looking cairn, close to (or at) the spot height marked on the OS map. To my eyes, the ruined cairn (see Simon's pic) looked higher, but I wasn't about to take on a 1 km trek there and back along the boggy summit just to find out! Linkback: https://mountainviews.ie/summit/158/comment/2568/

Knocknafallia is a mountain without any definite summit. There is a cairn marked on OS Discovery Series 74 but this is quite clearly not the high point. The attached photo shows the gradient to be tackled between Knockmeal and Knocknafallia. The photo was taken from the northern approach to Knockmeal. See Knocknagnauv for a continuation of the traverse. Linkback: https://mountainviews.ie/summit/158/comment/1874/