I did a very tough half ironman tri at the weekend .. with a killer bike ride (56 miles with just short of 7000 ft ascent and descent). Thought I'd share it with everyone because while it was incredibly tough, it was also stunningly beautiful, riding from Teignmouth in Devon up onto Dartmoor (in the UK).
We swum in the sea at Teignmouth to start, rode up and through Dartmoor with constant hills (one which was 450ft ascent in 0.5 miles) including 3 or 4 20% descents with some tight switchback corners, then we ran 15 miles round Dartmoor trails (which at points was more like fell running!)
It's a small event with only about 30 competitors, and only costs £50 ... superbly organised. If you're up for a challenge - I recommend it!
Accelerace Extreme Tri http://www.accelerace.co.uk/trirun