The Rock 'n' Roll Seattle Marathon is held annually in Seattle, Washington. It is part of the Rock 'n' Roll Marathon Series organized by Competitor Group, Inc.. The events include a half-marathon (21.0975 km) and a marathon (42.195 km). The inaugural event was held in 2009 and it has become hugely successful in recent years. More than 22000 runners participated in the 2012 edition.
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Rock 'n' Roll Seattle Marathon Wikipedia(Text) CC BY-SA