lie two large limestone caves, each of which swallows a stream fed by snow melt runoff, and because of this, both are particularly treacherous to enter. Both cave entrances, the insurgences, occur at a little over 8,000 feet in elevation, with Big Brush Spring, more than 5 miles away and 2,000 feet lower, serving as the resurgence for these subterranean waters .
Big Brush Creek Cave.
Little Brush Creek Cave.