I did a big one last year - 150 miles of running, MTB and kayaking through snowdonia in three days. I had a lot of fun going though all the great scenery and riding some trail centres, plus they added in a bit of canyoning, which was a laugh. It was my first adventure race and I hadn't done any running for 10 years beforehand so overtrained and buggered one of my knees a bit. Still came 12th out of 20 though. There's an ok forum called sleepmonsters and the race I did was put on by endurancelife, who also do some shorter ones around the country.
I did a big one last year - 150 miles of running, MTB and kayaking through snowdonia in three days. I had a lot of fun going though all the great scenery and riding some trail centres, plus they added in a bit of canyoning, which was a laugh. It was my first adventure race and I hadn't done any running for 10 years beforehand so overtrained and buggered one of my knees a bit. Still came 12th out of 20 though. There's an ok forum called sleepmonsters and the race I did was put on by endurancelife, who also do some shorter ones around the country.