100k event beginning in Florence, Italy. Includes general race details, photos, registration and contact information. English and Italian versions.

A 43 mile (69.3km) footrace starting from Tyndrum and finishing in Fort William in the highlands of Scotland.

210 mile multi-terraine, 20 leg, teams of 10, around London's Green Belt. Starts from Hampton Court Palace. Race and registration information, rules, photos and contact information.

Race information, online registration, accommodations and travel details, photos, sponsor information, and a guest book. English, Svenska, Deutsch, and Francais versions. In Lapland, Finland.

50k race in Preddvor, Slovenia. Site contains pictures, registration details, course information, and prizes. Also offers a 10k race.

Official site for this annual historic ultra-distance race of 246 km, starting in Athens and finishing in Sparta, Greece. Provides news, history of the event, race calendar, map route, and history.