Now how's this for something new? Navarra will host a 48-hour endurance race on March 14-17 next year. Eligible cars are close to what Nuerburgring 24h accepts: GT2, GT3, GT4, sports and touring cup racers, touring cars and CN prototypes, as well as some 'production sports cars'. Diesels are allowed as well.
http://maxiendurance48.com/
Definitely a race to watch.
P.S. Navarra of course, not Jarama, as I wrote in a thread name. Could some of the moderators change that please?