The Rocky Mountains in general act as sort of the high water tower of North America, as many of the continent's greatest rivers originate from the vast snowmelt taking place high up within them.
" This is no thaw, " said the dwarf, suddenly stopping. " This is Spring. What are we to do? Your winter has been destroyed, I tell you! This is Aslan's doing."
So mosquitoes are found in an incredibly wide range of environments, from coastal rock pools to snowmelt streams in our Alpine regions, from polluted drains to pristine wetlands and almost every puddle of water in between.
Just below the extreme summit hot sulphurous gases and vapor issue from irregular fissures, mixed with spray derived from melting snow, the last feeble expression of the mighty force that built the mountain.