Thank's. This is near with city Luga. I don't know websites where you can find calendar of competitions, but you can find any competition you want on my website. Because all organizers from S-Petersburg off-road clubs write about the nearest competitions on the forum on my website.
www.avtokosmos.ru
Nearest competition will be "Karbuselka" the next Suturday. This competition will be for two days: Suturday and Sunday. In Suturday organizers will lead passage of special sites, and on Sunday will be orientation.