In reply to balmybaldwin:
Well, that was an experience!
Managed to ride up a lot of of it, with the odd section carrying. The clouds came in near the summit which added to the atmosphere.
The Top of the ranger route down was good, as was the rockier section below it - until one of our group face planted and a fair amount of blood flowed (we patched her up and continued). The rocky steped section descending above the lake wasn't really rideable onsite with an XC bike, and I now see why there are so few videos of that section (the one posted above does include some bits, but is heavily edited). It's a real shame though, as that section looses you a lot of height, and the path out from the rock garden becomes really tame and uninteresting.
The run down through Telegraph valley is quite nice, but again the path seems supper smooth and unnatural apart from the awkwardly angled rain gullies which if miss-timed can take out your rear end.
All in all, worth doing for the experience, but not as good as I had hoped, partly because my skills weren't up to scratch in terms of full on downhilling, and not wearing armour made me a little too cautious.
If I were to do it again, I would probably come down the Llanberis path, as that was all rideable on any bike. I would probably also do it in the summer late in the evening when the paths would be quiet.
Some experiences learned:
1. Don't do it on a weekend - there are far too many walkers
2. Ranger path is not for those with less than 6" suspension, and armour of some kind
3. Don't wear SPDs - otherwise if you stop you'll have trouble getting going again
4. Some walkers are really unpleasant tossers - one bloke in particular taking pleasure in informing us that he was encouraging all other the walkers to have a go at cyclists
5. Many walkers were really nice and friendly, and it was good having a bit of banter on the way up.