Yes, you have to qualify – there are 2000+ people there to race, from pro DH & enduro racers to pro Singletrackworld keyboard wobblers, if you mixed them all together, it’s an even bigger recipe for disaster 😉
There is normally 8-10 qualifiers. 200-250 in each.
The first 35 go through to the main big boys race on Sunday morning. The next lot (36-70) go through to the next mass start race on Saturday morning. 71-105 go through to the last mass start race on Sunday. 106+ go into the Mega Affinity thing, which is no mass start, they just swipe your timing chip at the start and finish & off you go – it’s not really a race.
Regarding the amount of snow – it depends on the winter they have, in short. If they have tonnes of snow, it struggles to melt in time. 2011 there was virtually none, this year for example, there was a massive amount.