Just did this race last weekend as the World Long Course Duathlon Championships and, if you're of a biking and running persuasion and like your hills, I can highly recommend it. Distances/Ascent are:
Run 1: 10 km / 300m
Bike: 150 km / 1800m
Run 2: 30 km / 600m
Runs are 80% on forest trails and the race organisation is brilliantly Swiss... one of the toughest but best events I've ever done.