The Glenmacnass waterfall is one of the highest waterfall in the Republic of Ireland and is located between Sally Gap and Laragh (Wicklow county).
The Glenmacnass waterfall is a tourist attraction and can easily be reached when driving from Laragh to Sally Gap on road R115. Halfway you already see the waterfalls cascading down a big rock formation at the left side of the road (when driving from Laragh to Sally Gap). A little further there is a big parking at the left side of the road “Tonelagee Car Park” (gps 53.066535, -6.339364).
There isn’t a trail that runs to the base of the waterfall but you can walk back for a good view on the Glenmacnass waterfall. It is possible to walk to the base of the waterfall because I have seen pictures of it. I am afraid you have to enter private property (at the house along the road) to go to the base but I can imagine you won’t get permission.