Cardiff Blues Development Officer Mal Jones said, "All the teams in the semi final stage are good teams, however, the draw has pitched together a number of sides that don't play each other too often, including North v South regional clashes at each age group.
"The teams will all be looking forward to these mouth watering clashes, even though there are still one or two Quarter Final games yet to be settled due to inclement weather."
Rhiwbina themselves can claim the Under 12s title this season to add to last year's Under 11s trophy if they can defeat Mountain Ash away, while Pontypridd can also claim the Under 13s title, following their success at Under 12s last season, however they face a stern challenge when they face Rhiwnina.
Cowbridge v Pentyrch
Merthyr v Rumney
Gwrnyfed v Llandaff
Pontypridd v Rhiwbina/ Rumney
Mountain Ash v Rhiwbina
Pentyrch/ Cowbridge v Penarth/ Abercynon
Pontypridd v Rhiwbina
Ystradd Rhondda v Merthyr/ Aberdare
St Peters v St Josephs
Llanishen v Beddau
RAF Careers support grassroots rugby across Wales, and their motivational team have been working closely with the Blues to deliver exercise programmes in association with the Blues development scheme at schools and clubs this year as well as at the Blues Open Day. They'll be returning for the Blues Open Day again this summer as their support of rugby in the Blues community will continue for 2010/11 season.
All ties to be played by 18th April
The finals day will take place at Cardiff Arms Park on 25th April