dryfj.com / drycyclist.com

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 At the base of these yuccas is a pile of twigs covered with gravelly rock The former road to Bolder Spring is being erased by the forces of natureThumbnailsThis nearby rock outcrop will serve as a nice spot for a short breakThe former road to Bolder Spring is being erased by the forces of natureThumbnailsThis nearby rock outcrop will serve as a nice spot for a short breakThe former road to Bolder Spring is being erased by the forces of natureThumbnailsThis nearby rock outcrop will serve as a nice spot for a short breakThe former road to Bolder Spring is being erased by the forces of natureThumbnailsThis nearby rock outcrop will serve as a nice spot for a short breakThe former road to Bolder Spring is being erased by the forces of natureThumbnailsThis nearby rock outcrop will serve as a nice spot for a short break

It could be that the twig pile was originally built for nesting or cover by critters. A flash flood passing through the area at a later date may have deposited the gravel layer on top.