Is there a Park and Ride at Maguiresbridge on the A4?

Yes.

The official list includes Maguiresbridge at the A4/A34 junction as a bus Park and Ride. It is a small interchange location near the Enniskillen–Fivemiletown road corridor, not a main bus terminal. If you want to board a particular bus, check the stop in the operator’s timetable before using the site. Enter “Maguiresbridge A4/A34 Park and Ride” in your route planner and use the designated parking area rather than the junction itself.