We had a few years of really pathetic entry numbers in DH (as low as 70) and at the time I'd have put the reason almost entirely down to the popularity and hype of Enduro racing but this year I hear the SDA DH series sold out the day entries when live (*350). Not exactly sure what's changed TBH. mtb in general definitely still seems to be growing though.A lot of it stems from the fact people realize many mellower DH tracks didn't really require a DH bike and most people don't really want to ride the really difficult dh tracks. Those are usually way emptier in most parks. Also people simply ride DH less. I remember around 2010 a National Cup ran out of number plates for racers. We had 400+ people. Now it's 100-150 per race.