The game was played as a double-header as both teams won their respective leagues as well as their cup rounds.
Caernarfon fielded a young side with many regional players amongst them but were without international Kate Jones who is taking part in the World Cup this month.
Llandaff North, captained by flanker Kate Newton, had five U19 internationals in the side. They got off to a good start when strong passing in the backs allowed winger Stacy Hardie to cross the line after 5 minutes. Moments later, Inside Centre, Jen Elkins scored under the posts and Vicki McGrath converted to give the Cardiff-based side a comfortable lead at half time.
Llandaff North applied the pressure again in the second half adding further points through tries from No 8 Emily Steer and Full back Nicola Evans. McGrath kicked another two conversions to give Llandaff North a 26-0 lead. With ten minutes remaining Caernarfon pushed on the Llandaff North line but superb tackling by winger Laura Williams held them out. The final score was 26-0
Wales U20 captain Tom Phillips and performance psychologist Dr Rich Neil explain why spending three days at Monmouth RFC has further strengthened the togetherness of the squad ahead of the #WorldRugbyU20s
Alongside Scarlets flanker James Davies and Cardiff Blues centre Cory Allen, three Wales Sevens core players have made the extended training squad for GB Sevens. Wales Head coach Gareth Williams tells WRU TV's Graeme Gillespie why Luke Treharne, Sam Cross and Luke Morgan earned selection in the initial training squad for Rio.
Wales Sevens head coach Gareth Williams tells WRU TV's Graeme Gillespie he has had to overcome a number of injuries before naming a competitive squad for this weekend's penultimate round of the World Series in Paris.
Merthyr were officially crowned champions of the SSE SWALEC Championship at Dowlais on Saturday where captain Andy Powell paid tribute to his side who have earned promotion to the Principality Premiership
Coleg y Cymoedd's season has had a spectacular ending with victory in two cup finals and a massive victory over one of the best rugby playing schools in the world - Welsh coach Warren Gatland's old alma mater, Hamilton Boys' High School.
WRU chief executive Martyn Phillips hosted the second meeting of the WRU Youth Board last weekend ahead of the Judgement Day IV regional double-header. Tthe board, made up of 15 under-21-year-olds from around Wales, heard presentations from head of participation Ryan Jones, policy and integrity manager Jeremy Rogers and national women's rugby manager Caroline Spanton, with Pro Rugby Wales CEO Mark Davies also on hand to hear the range of views aired.
Wales duo Rhun Williams and Liam Belcher, who makes a welcome return after five months of injury woe, look ahead to next month's World Rugby U20 Championship in Manchester where they will face Ireland, Georgia and New Zealand.