For information on fisheries with facilities for disabled anglers in Ireland go to:
The Cong river is the outflow from Lough Mask, a weird beast of a river that looks manmade. The river cuts a "gorge" through the limestone rocks creating what looks like a canal. You can see from the Google Steet view screenshot why they recommend fishing from a boat.
Down near the town of Cong the river is more accessible offering good fishing for salmon and wild brown trout. The Cong is an open fishery with a run of springers peaking in April and grilse come in June and July. Being a limestone river connecting two of the best trout fisheries anywhere you can expect to catch some very good trout.
Fishing is free above Ashford Castle but at Ashford Castle there is a small charge to access the grounds. There are two designated fishing stands for disabled anglers.
Sorry, could not find any fisheries offering facilities for disabled anglewrs. In my searches I often find that areas with such an amount of wild trout fishing as there is in Galway there is little or no call for a rainbow fishery, they are often the best source of accessible fishing.
Must be an opportunity to puts a wheelieboat or 2 on Corrib. I did see a lot of jetties in areas some with vehicle access to the waters edge, maybe that would at least give disabled anglers a cast. Have a look at Galway, Corrib, there are a couple of screen shots from Google the will give you the idea.
Ballyquirke Lake at 150 acres holds good stocks of pike, bream and roach. 20lb+ pike are not uncommon with some specimens reaching 30lb+.
There are 2 stone built concrete surfaced platforms with a steel guard rail suitable for use by anglers with disabilities located on Olivers Shore.
Google Screen Shot Ballyquirke Lake vehicle access right the waters edge here
Google Map 53.323244, -9.152172
a good sized lake of about 3km long and 1 km widewith good stocks of pike, perch, bream, roach, hybrids and some tench down by the outflow stream. Pike to 20lb not uncommon.
There are lots of fishing platforms along the shore at these two Google Map References.
53.363782, -9.203415 and 53.371829, -9.202608
One platform designed for disabled anglers.