Sandstone caves in Castle Rock formations
Sandstone caves in Castle Rock formations
Highlight • Cave
Sandstone caves in Castle Rock formations
Mountain biking
5.0
(7)
This Highlight is in a protected area
Please check local regulations for:
Tips
June 16, 2016
Mountain biking
Slightly acidic rainwater seeps into the sandstone during winter rains and dissolves some of the calcite. Warm and dry days cause the moisture to pull the dissolved calcium back out of the rock, causing holes and caves to form.
Watch for peregrine falcons and other birds of prey nesting high up in the Castle Rock caves.
The upper trails are closed Feb-July to avoid disturbing the nesting birds.
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Elevation 100 m
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