Rowley, who was the WRL's first full-time chairman before becoming general manager in 2011, is to quit his post this week for personal and business reasons.
He said: "I am very saddened to be leaving the Wales Rugby League. I am passionate about rugby league and its development in Wales and, in that respect, I have dedicated 10 years to the cause. However, due to personal and business reasons, I now have to move on."
WRL chairman Brian Juliff said: "Mark has been an integral part of Wales Rugby League that has seen us achieve many great things, including our senior team playing in the Four Nations against England, Australia and New Zealand in 2011 that helped us rise up the global rankings to sixth in the world.
"It is a sad day to see somebody who has rugby league in his heart having to move on to other things."
- Sports & Recreation
- Wales Rugby League
- Brian Juliff