Head up Rumney Hill. Turn right at the first set of traffic lights into Tredelerch Road. Follow this and turn left at the end. You are now in New Road. Follow this and turn (1st) right into Brachdy lane. A short distance on you see the pitches on your right.

 

There is no specific parking and unsurprisingly the area can get extremely congested. A possible solution to  this is turning right at the end of Tredelerch Road and parking there. A lane access (easily visible) takes you into th eplaying field. A bit of a walk, but maybe worth it to avoid the choas further down the road.