Les 4 Alpes

bahzob
bahzob Posts: 2,195
Many folks will, I guess be at Bourg D'Oisans this year for the Marmotte and/or the tour.

If you are there and fancy a challenge this route is a great ride and less difficult now that Col de Sarenne has been improved (a bit) for the tour.

http://connect.garmin.com/course/4024352 (This actually starts/finishes a bit out of Bourg near Col D'Ornon as I was staying there at King of the Mountains at the time.)

It goes up/down Alpe D'Huez 3 utterly different ways and throws in a climb up les deux alpes for good measure. It also has some amazing views along the balcony roads that run both sides of the valley.

All in its near 190km with 5000m+ of climbing so is pretty much the same as the Marmotte route in terms of difficulty.
Martin S. Newbury RC