The Connemara 100 on the West Coast of Ireland is run over a measured and certified course. The 2012 event was AAI permitted and awarded an IAU Bronze Label.
The course is simply fabulous, taking participants from Clifden through Letterfrack, Lettergesh, the Inagh Valley, Maam Cross, Leenane, Inagh Valley again, then on to Roundstone, Ballyconneely and back to Clifden to complete 100 miles.
There is a 30 hour limit and every participant must have their own crew with them at all times to look after water, food etc.
There will be medical support but because the course stretches over such a long distance there may be up to 25 miles between aid stations. So experienced crew support is essential and mandatory.