ＩＡＵのサイトで来年（２０１４年）の「１００ｋｍ世界大会」の開催日が発表されました！
現地には（おそらく）行かないです（笑）
（ＩＡＵのサイト原文）
The 100km World and European Championships scheduled to be held in Daugavpils, Latvia will be on August 31st 2014.
The LOC is doing very well with their preparations for the race. We have been in constant touch with them including a recent site visit by IAU Council member.
If you have further questions, please do not hesitate to contact us.