You will find here links offering English information on many different races held all over the world.
DOWNHILL SCENE - A site completed dedicated to the downhill races. Very well done and original. Downhill is a different world so this site is a nice idea.
MARATHON DEL NILO - Usually I do not list races, because they are too many all over the world, but this is really special. A 1000 km race in two different countries: Spain and Egypt. Ten days of extreme conditions and incomparable landscape. The site is in different languages and rather complete. It offers a small map, a description and some organization details.
MOUNTAIN BIKE RACES - A site with a complete calendar of MTB races held in the United States during the current year. Easy to read and rich with detailed information.