In Niall Ó Dónaill's Fóclóir Gaeilge-Béarla,tuaras na Cruaiche is translated as a pilgrimage to Croagh Patrick, at least the way I understand it. One would assume it is a pilgrimage to some peak.

Also a line appears to be ambiguous to me:

Bíonn mil ar luachair ann seems to be literally, Honey on rushes. Luachair however, seems to have another connotation: bright, glittering.

Brían