By the way, there is a comment that since this "spring" dries up overnight, it can't really be a "spring". It is actually snowmelt from a bowl above the trail where there is a snow patch that pretty much remains all summer. So when the melting stops, either due to cold temperatures or the snow finally completely melting away, this spring dries up.
The water does travel underground (or at least under the surface broken rocks) from that snow patch, and it reappears at the surface on the switchbacks. So whether it is called a "spring" or something else can be left to debate.
Bottom line, though, is that most regulars will dip and drink from this water source.
