The most travelled routes to this summit are from the direction of the Sugarloaf.
Starting at the Vee, where there is lots of room to park safely by the roadside, and heading up the rough, often boggy track past the Grubb monument (large stone cairn by the roadside), join the stone wall just after the Sugarloaf summit cairn and follow the wall towards Knockmealdown ,leave the wall and cross the mountainside at 730m elevation just before the final pull to Knockmealdowns summit to reach the rocky pile of stones that marks Knockmoylan.
You can also park in Bay lough carpark S031 101 A, cross the main road and follow the steep rocky track, keeping the stone wall to your left to the top of the Sugarloaf, turn east then to follow the wall as before.
You can make the ascent somewhat easier by parking at the Vee, walk to the sharp apex of the Vee itself and follow the Munster way( signposted as St Declans way here) down into Glenmoylan. Do not cross the stream instead follow the path to the right going up the glen almost as far as where the non-existant Lough Moylan is shown on the OS maps , look for a rocky zig-zag path going up to the col between the Sugarloaf and Knockmealdown and follow it up. Cross the col to find the wall as mentioned and follow it again as before. A longer walk can be had by starting at S112 083 B (Point B) on the road between Mellary and Newcastle. Linkback: https://mountainviews.ie/summit/61/comment/4821/

We drove as if heading to the Liam Lynch Memorial, near Goatenbridge. At the T junction beside the barrier (on the left) we parked and took the right branch of the T which went left 50 m or so down. The road followed the river through a very attractive valley until we came to another right turn with two bridges. Just after the bridges is a short hill and a sharp turn to the left (lot of litter at the turn) From the apex of this turn is a firebreak that cuts straight up to the mountain, though you need to come around the turn and double back through the trees to get to it. This is a hard enough pull but get's you onto the side of Roche's hill handy enough. From there it is a tough walk that gets steadily steeper as you approach the summit of Knockmoylan. Linkback: https://mountainviews.ie/summit/61/comment/3077/

2nd top of a short horseshoe walk. It really is a case of 2 tops for the price of 1 as Knockmoylan is only a short walk from Knockmealdown. The summit is marked by a rather strange cairn! Great views onto the patchwork of fields below as well as across to Slievenamon and the Comeraghs. Write-up of my walk is at http://climbingirelandsmountains.blogspot.com/2011/09/evening-in-knocmealdowns.html Linkback: https://mountainviews.ie/summit/61/comment/6539/

Knockmoylan, unnamed on the 1:50k map, only just qualifies as an independent top. It forms part of a ridge running North from Knockmealdown. The photo taken from the top shows the continuation of this ridge towards its northern end, known as Knockshane. Linkback: https://mountainviews.ie/summit/61/comment/418/

Knockmoylan from Knockmealdown. Started at the Gap carpark and up the Sugarloaf in dense cloud - just as well the county wall was there to follow- then along the the ridge and descending from Knockmealdown to the road junction. 3.5 hrs Linkback: https://mountainviews.ie/summit/61/comment/1168/

Knockmoylan is reached by staying on the ridge from Knockmealdown and heading first in a north west direction and then turning north and is 1.25 km distance. This view in the photo is taken from the summit of Knockmealdown with the flat plains to the north in the background. See Sugarloaf to continue the traverse. Linkback: https://mountainviews.ie/summit/61/comment/1878/