Nakvaligach Nakvaligach , also called the " Northern Barrens " , was the most dangerous region of the Great Glacier . Geography . Nakvaligach , the smallest of the three regions of the Glacier , was located north of Alpuk , across the Uppuk River . It was bordered on the west and east by the Tuutsaas Chain and the Keryjek Ridge respectively . Unlike the two " Basins " , Alpuk and Angalpuk , Nakvaligach was covered with mountainous terrain and treacherous crevasses . This played a role in the architecture of the region , where Nakvaligach residents made use of stones in their constructions . It also affected the ease of transportation ; sleds were not of great use here . The ice depth was usually between 200 and 500 feet ( 60 – 150 m ) , though it thinned to as little as five to ten feet ( one and a half to three meters ) in central areas . In the northern mountains , the ice layer was nearly a mile ( one and a half kilometers ) thick . There was very little potable water in the region . Weather . Because of the higher altitudes , stronger winds , and distance from the larger seas , the temperatures in Nakvaligach were more severe than anywhere else on the Great Glacier , dropping even as low as 150 °F ( 100 °C ) below zero in the northernmost mountains . This was so bitter cold that it was said that winds here could freeze a person solid mid - step . Elsewhere , average temperatures ranged from −50 °F ( −46 °C ) to 15 °F ( −9 °C ) in the spring ( from Mirtul to Kythorn ) with a daytime average of −5 °F ( −21 °C ) and a nighttime average of −35 °F ( −37 °C ) . In the month of Flamerule , temperatures might range from −20 °F ( −29 °C ) to 30 °F ( −1 °C ) with a daytime average of 10 °F ( −12 °C ) and a nighttime average of −10 °F ( −23 °C ) . During autumn , ( the months of Eleasis through Uktar , ) they ranged from −55 °F ( −48 °C ) to 0 °F ( −18 °C ) . The daytime average was −10 °F ( −23 °C ) , and the nighttime average −40 °F ( −40 °C ) . Temperatures fell as low as −95 °F ( −71 °C ) in the long winter ( from Nightal to Tarsakh ) and rarely rose any higher than −30 °F ( −34 °C ) . The average temperatures for winter were −55 °F ( −48 °C ) during the day and −75 °F ( −59 °C ) at night . Strong winds could make them temperatures seem even colder . Fewer than five to eight inches ( thirteen to twenty centimeters ) of precipitation fell in the region per year . Flora & Fauna . Deer , polar bears , and a variety of fish and birds were found in Nakvaligach . Unlike other regions of the Great Glacier , seals did not live here , and the caribou populations were lower , rarely existing in herds of more than one hundred animals . The " mukteff " , a gold - furred sled dog , was native to Nakvaligach . Tirichik laired in the most desolate areas of Nakvaligach , deep within its crevasses . Short birch , evergreen , or willow trees somehow managed to survive in isolated regions of Nakvaligach , rarely growing more than ten feet ( three meters ) tall . Flame heather was a strange plant unique to Nakvaligach . This yellow and red plant was known to burn very slowly , which made it useful for house fire pits . History . In 1339 DR , Sharra Frohm the great - great - great - granddaughter of the famous explorer Palus Frohm set out to explore Nakvaligach and complete a second volume of his work " Blood and Ice " . Inhabitants . Only about five percent of the Ulutiun humans living on the Great Glacier lived in Nakvaligach , because of its hostile environment . These people were the Nakulutiun s , and their total population was estimated between 2 , 500 and 3 , 750 souls in 1359 DR . The largest ( by far ) Nakulutiun settlement was Kresttet , which only had a population of 300 . Frost giant s and white dragons lived in the mountains , and both groups kept the Nakulutiuns living in fear with periodic raiding . Small groupings ( usually fewer than seven individuals ) of yeti also roamed the mountains here . Some of them were subservient to the white dragons .