Thinking of spending a few days in Westport and cycling this greenway to Achill and back. What bikes are best suited to this - mountain bike or road (racer type) bike. I don't have a hybrid bike.
Rent a bike. And if you don't fancy the cycle back most places will pick you up. Racer not suitable as it's a track in places. Mountain bike may be too sluggish. Enjoy it a great cycle