In reply to Hall on the Hills:
In dry summer conditions of light wind, being done by a party that is happy to take various bypass options, as others have stated, the Forcan Ridge is not the hardest of big western ridge outings. Having done it in pretty much every conditions imaginable, it does get pretty sporty once conditions start conspiring against you.
In winter in particular, there may come a point where none of the bypasses are viable and the safe plan is to take every one of the crest difficulties head-on.
If it is still too easy for you then look in the logbook section (where every version gets three stars) and you will find the winter version "Forcan Ridge, Double Direct II/III" which is 'just' up the ridge and down the ridge giving 450m vertical and 3.2km. You can take a similar approach in the summer of course.
Accidents do happen on the Forcan Ridge, including fatalities, but, considering its potential for trouble, these accidents are quite rare. Please wear a helmet since heads can be quite useful and it will be useful for yours to be still in working condition after a fall. Some posters have already mentioned the rock type and there have been some dangerous problems in the past with loose rock. In the 1980s (IIRC) a rock the size and shape of a bus detached from the south side of the ridge and sat there crumbling away for years which tends to indicate that in rather alpine fashion the whole thing is more temporary than you think. The popular ramp up onto the bottom of the ridge on the south side has been a problem area on and off for about a decade with rocks of several hundred kilos detaching at times. Starting the ridge a bit lower down will sometimes be the solution. Another area for special care is the ever-popular south-side (left turn) bypass of the descent of the step west of Squrr nan Forcan. At times, several large rocks have detached near the top and presented a serious hazard to those descending the top part of this bypass.
Take care. Enjoy.
Post edited at 22:34