Check out the excellent app on offer from Every Trail at http://www.everytrail.com/guide/lough-derg-canoe-trail
All the information you would need to plan a canoe trip on Lough Derg is offered including maps, destination guides, photos, safety tips and advice. This is only 1 of 22 Shannon Region guides courtesy of Shannon Region Trails.
The paddle across to Holy Island from Mountshannon was one of the highlights of my trip down the Shannon. We set off from the jetty at the Lakeside Holiday Camp http://www.lakesideireland.com/ where our tent was pitched in an excellent waterside spot. You can hire canoes at the campsite, which we did on this occasion. If you head straight out from Lakeside towards the island you will come to an old stone jetty which is a very short stroll from the monastic site.
Feeling less adventurous? Don’t worry, Ger Madden provides a boat trip and guided tour. For details see the East Clare Heritage website