If you plan to visit the Cliffs, above is link for free shuttle bus. Park for free in Lisdoonvarna or Doolin. Bus Tickets are free and free entry to Cliffs of Moher Must prebook bus tickets on above link
It is also a free hop on and off bus to visit other villages & visitor attractions. Routes & timetables in above link.
Free Shuttle Bus Service
Burren National Park Free Shuttle Bus
From May to August, the bus service will operate from Burren National Park information point in Corofin to the trailhead at Gortlecka Cross near Kilnaboy in the National Park.
The bus runs 14 times a day, seven days a week, with the first bus leaving Corofin at 930am and the last bus returning from the park at 5.15pm.
Maps and information are available at the information office in Corofin.
You can also check the website for more informations.
For enquiries on guided tours and bus times, please phone the Burren National Park Information Point in Corofin Tel +353 65 6827693 or email: burrennationalpark@npws.gov.ie