Col du Lein (from Saxon), Switzerland (13,0km, 8,8%)
This one's pretty vicious. A constant high gradient.
The location for this one is nigh on perfect to use in a number of races - the descent from the Col du Lein (on its easier side, so not as steep or as treacherous as the side from Saxon) deposits the riders right at the base of the Verbier climb. And of course the Verbier climb isn't especially long or especially steep, so we might be able to see some fireworks on the Col du Lein. And fireworks we should see. The location makes it a possible inclusion in the Tour de Romandie, the Tour de Suisse AND the Tour de France, although the time of year may rule the former out.
The climb starts in the Walliser Tal, and as a result the scenery is spectacular:
The look of the climb itself is nothing to be sniffed at either - it may be no Fedaia, but it will give most climbs a run for their money:
The only problem that we have is that for part of the last kilometre of the climb and the first 200m or so of the descent we have sterrato. As you can see here, however, the sterrato is not the most challenging, and the road is easy enough to handle with road bikes:
The short distance of sterrato shouldn't be a real problem to anybody as it's in good condition and not very long, and so given the location and the ease with which it can be attached to other climbs, especially Verbier, and also to potential stage towns like Martigny and Orsières, mean that this is probably, after São Macário, the climb that I've mentioned thus far that baffles me the most as to why it isn't being used.