has its headwaters in the La Sal Mountains but only flows during spring snowmelt and flash flood events. But when it contains water it is very capable of moving large clasts down the steep channel gradient.
View upstream in the Castle Creek channel showing a mix of sedimentary and igneous plutonic clasts.
View of alluvial deposits in the bank of Castle Creek below Adobe Mesa. My black bike helmet is near the center of the image for scale. Note the imbrication of many of the larger clasts, with a distinct upstream-dipping direction to the right.