Not sure about the environmental impact though with smashing the rock faces and smoothing off pinnacles etc.
Presumably they (Red Bull) have permissions from the relevant state authorities etc.?
I’m currently in southern Utah on holiday – I was in Virgin the other day and went to the Rampage staging area (though not to the event area) as I was camped literally less than a mile away.
There are literally millions of acres of land like this. When you first arrive, the red rock and massive cliffs and weird landscapes seem novel and unique but when you drive for HOURS and see the same type of rock formations all over, then you’d appreciate that such man made alterations aren’t even worth thinking about. Also, any reasonable storm system re-shapes the soft rock fairly quickly.
The Rampage site(s) are on BLM* land, so Federal rather than State owned. And the BLM are responsible for licensing oil and gas exploration, mining and that type of industry on their lands so unlikely to be the slightest bit bothered by some minor landscaping by mountain bikers.
* Bureau of Land Management
Top tip: of all the land management agencies in the US, the BLM seem the most “user friendly” meaning it’s easier to get trails built AND you can wild camp for free in a lot of places