@frptrd It is this is the upper part of the Canyon when they first dip in. It was really a magical place. You see the tiny speck balloon over the ridge, coming at you faster and faster till it drops down and blazes by you. Depending on what part of the canyon can be above them as they run it. Here is part of the entry sequence.

It is an extreme environment to shoot. Note the specks of dust on the lens. That day was 110F and we had a 20mph+ wind blowing into your face. Its like someone holding a gritty hairdryer on you lol