on ▁I - 7 0 ▁reaches ▁the ▁western ▁termin us ▁of ▁U . S . ▁Highway   2 4 , ▁which ▁me and ers ▁through ▁the ▁Rock ies ▁before ▁rejo ining ▁I - 7 0 . ▁US   2 4 ▁is ▁known ▁as ▁the ▁Highway ▁of ▁the ▁Four teen ers , ▁from ▁the ▁concentration ▁of ▁mountains ▁exceed ing ▁ ▁along ▁the ▁highway ▁cor rid or . ▁Al ong ▁the ▁as cent , ▁I - 7 0 ▁serves ▁the ▁ski ▁resort ▁town ▁of ▁V ail ▁and ▁the ▁ski ▁areas ▁of ▁Be aver ▁Creek ▁Res ort , ▁V ail ▁Ski ▁Res ort ▁and ▁Co pper ▁Mountain . ▁ ▁The ▁construction ▁of ▁the ▁fre ew ay ▁over ▁V ail ▁Pass ▁is ▁also ▁listed ▁as ▁an ▁engineering ▁mar vel . ▁One ▁of ▁the ▁challeng es ▁of ▁this ▁portion ▁is ▁the ▁management ▁of ▁the ▁wild life ▁that ▁ro ams ▁this ▁area . ▁Several ▁parts ▁of ▁the ▁approach ▁to ▁the ▁pass ▁feature ▁large ▁f ences ▁that ▁prevent ▁wild life ▁from ▁crossing ▁the ▁fre ew ay ▁and ▁direct ▁the ▁animals ▁to ▁one ▁of ▁several ▁under pass es . ▁At ▁least ▁one ▁under pass ▁is ▁located ▁along ▁a ▁natural ▁mig rat ory ▁path ▁and ▁has ▁been ▁land sc aped ▁to ▁encou rage ▁de er ▁to ▁cross . ▁ ▁The ▁highway ▁desc ends ▁to ▁D illon ▁Res er voir , ▁near ▁the ▁town ▁of ▁F ris co , ▁and ▁begins ▁one ▁final ▁as cent ▁to ▁the ▁Eisen h ower ▁T unnel , ▁where ▁the ▁fre ew ay ▁cross es ▁the ▁Cont inental