▁mountain ' s ▁name ▁was ▁applied ▁in ▁ 1 9 1 1 ▁by ▁Lawrence ▁Martin , ▁and ▁officially ▁adopted ▁in ▁ 1 9 3 0 ▁by ▁the ▁U . S . ▁Board ▁on ▁Geographic ▁Names ▁to ▁honor ▁Ed win ▁For bes ▁Gl enn ▁( 1 8 5 7 – 1 9 2 6 ), ▁an ▁Army ▁officer ▁who ▁expl ored ▁this ▁College ▁F j ord ▁area ▁in ▁ 1 8 9 8 . ▁The ▁Gl enn ▁Highway ▁is ▁also ▁named ▁for ▁this ▁same ▁person . ▁ ▁Cl imate ▁ ▁Based ▁on ▁the ▁Kö ppen ▁climate ▁classification , ▁Mount ▁Gl enn ▁is ▁located ▁in ▁a ▁sub ar ctic ▁climate ▁zone ▁with ▁long , ▁cold , ▁snow y ▁winter s , ▁and ▁m ild ▁sum mers . ▁We ather ▁systems ▁coming ▁off ▁the ▁G ulf ▁of ▁Al aska ▁are ▁forced ▁up wards ▁by ▁the ▁Ch ug ach ▁Mountains ▁( or ographic ▁lift ), ▁causing ▁heavy ▁precip itation ▁in ▁the ▁form ▁of ▁ra inf all ▁and ▁snow fall . ▁Tem per atures ▁can ▁drop ▁below ▁− 2 0 ▁° C ▁with ▁wind ▁ch ill ▁factors ▁below ▁− 3 0 ▁° C . ▁This ▁climate ▁supports ▁the ▁Harvard ▁and ▁Y ale ▁Gla ci ers ▁surrounding ▁this ▁mountain . ▁The ▁months ▁May ▁through ▁June ▁offer ▁the ▁most ▁favor able ▁weather ▁for ▁clim bing ▁or ▁view ing . ▁ ▁See ▁also ▁ ▁List ▁of ▁mountain ▁pe aks ▁of ▁Al aska ▁Geography ▁of ▁Al aska ▁Mount ▁Cast ner ▁ ▁References ▁ ▁External ▁links ▁ ▁We ather : ▁Mount ▁Gl enn