. ▁ ▁The ▁state ▁highway ▁runs ▁through ▁a ▁narrow ▁valley ▁between ▁Will s ▁Mountain ▁to ▁the ▁east ▁and ▁Little ▁Al leg hen y ▁Mountain ▁to ▁the ▁west , ▁par alle led ▁by ▁Will s ▁Creek ▁and ▁CS X ' s ▁Ke yst one ▁Sub div ision . ▁ ▁MD ▁ 3 5 ▁passes ▁through ▁Ell ers lie , ▁within ▁which ▁the ▁highway ▁cross es ▁a ▁branch ▁of ▁Will s ▁Creek , ▁before ▁reaching ▁its ▁northern ▁termin us ▁at ▁the ▁Pennsylvania ▁state ▁line . ▁ ▁The ▁highway ▁continues ▁north ▁as ▁PA ▁ 9 6 ▁( Hy nd man ▁Road ) ▁toward ▁Hy nd man . ▁ ▁MD ▁ 3 5 ▁is ▁a ▁part ▁of ▁the ▁National ▁Highway ▁System ▁as ▁a ▁principal ▁ar ter ial ▁for ▁its ▁entire ▁length . ▁ ▁History ▁The ▁valley ▁of ▁Will s ▁Creek ▁north ▁of ▁Cor rig an ville ▁has ▁a ▁significant ▁place ▁in ▁rail road ▁history ▁as ▁not ▁only ▁part ▁of ▁the ▁as cent ▁from ▁C umber land ▁to ▁the ▁Sum mit ▁of ▁the ▁Al leg hen ies ▁at ▁Sand ▁P atch ▁but ▁also ▁part ▁of ▁the ▁route ▁between ▁F rost burg ▁and ▁Bed ford , ▁Pennsylvania . ▁ ▁No ▁less ▁than ▁three ▁different ▁rail ro ads ▁used ▁the ▁part ▁of ▁the ▁valley ▁north ▁of ▁Cor rig an ville ▁in ▁the ▁late ▁ 1 9 th ▁century : ▁Baltimore ▁and ▁Ohio ▁Rail road , ▁C umber land ▁and ▁Pennsylvania ▁Rail road , ▁and ▁Western ▁Maryland ▁Railway . ▁ ▁The ▁first ▁road ▁built ▁through ▁the ▁valley , ▁the ▁Creek ▁Road