Possibly the swiftest route to your roots.
Irish genealogy website directory.
www.from-ireland.net/county/article/R.-C.-Parish-Records%2C-Co.-Mayo/Mayo
Description:
Please note, that while it may be very exciting to discover that records exist for the parish you are interested in, continuously from the mid-1700s to 1880 - do not place too much emphasis on that fact, records that are so old tend to be in bad condition, sometimes so faded as to be illegible. Unfortunately, the same can also be said for some records that were created in the mid-1800s