Some useful websites:A great race listing site www.ultramarathonrunning.com
Other UK sites
www.ultrarunningworld.co.uk A site full of ultrarunning news and events. You can download the latest copy of the Ultrarunning World magazine from this site.
www.runfurther.com Home of the UK ultra-running championships with links to races and other sites.
www.mudsweatandtears.co.uk News of worldwide off-road running.
www.runningmonkey.co.uk Lots of stuff about ultrarunning including a good article about injuries
www.ultrunr.com loads of information and links here.
www.ultrarunning.com Home of the US Ultrarunning magazine, but it also has some very good training advice and other articles that you can access online.
www.extrememarathons.com Two great events in different parts of South Africa.
www.comrades.com The world's oldest ultra.