In my league, minimum age is 18, The oldest in in her 50's
Yes, most amature leagues minimum age is 18, however, if you live in the states and you are a girl, aged 12-17 you probably will find a team of 'derby brats' near you (a junior league to train and play in until you are old enough to try out for the big league) However, if you live in Canada or anywhere else, you probably will have to wait until your 18.
Greensboro Roller Derby was created in 2010.
Roller Derby - brand - was created in 1936.
Roller Derby Germany was created in 2011.
Helsinki Roller Derby was created in 2009.
Houston Roller Derby was created in 2005.
Pacific Roller Derby was created in 2008.
Junior roller derby was created in 2007.
Roller Derby Toulouse was created in 2010.
Wasatch Roller Derby was created in 2008.
NEO Roller Derby was created in 2007.
Toronto Roller Derby was created in 2006.
Maine Roller Derby was created in 2006.