1 ▁near ▁H ors es ho e ▁Bay . ▁The ▁highway ▁travel s ▁through ▁H ors es ho e ▁Bay ▁and ▁Cot ton wood ▁Sh ores , ▁running ▁parallel ▁to ▁the ▁Colorado ▁River , ▁Lake ▁L B J ▁and ▁Lake ▁Mar ble ▁F alls . ▁R M ▁ 2 1 4 7 ▁enters ▁the ▁southern ▁portion ▁of ▁Mar ble ▁F alls ▁and ▁begins ▁an ▁overlap ▁with ▁US ▁ 2 8 1 . ▁The ▁two ▁high ways ▁travel ▁south ▁and ▁R M ▁ 2 1 4 7 ▁leaves ▁the ▁overlap ▁and ▁travel s ▁in ▁a ▁mostly ▁east ward ▁direction ▁before ▁ending ▁at ▁County ▁Road ▁ 4 0 2 . ▁ ▁R M ▁ 2 1 4 7 ▁was ▁designated ▁on ▁September ▁ 2 7 , ▁ 1 9 6 0 , ▁running ▁from ▁US ▁ 2 8 1 ▁to ▁the ▁Al vin ▁Writ z ▁Dam ▁at ▁a ▁distance ▁of ▁. ▁The ▁highway ▁was ▁extended ▁ ▁to ▁R M ▁ 9 3 ▁( now ▁SH ▁ 7 1 ) ▁on ▁June ▁ 2 8 , ▁ 1 9 6 3 . ▁R M ▁ 2 1 4 7 ▁was ▁extended ▁along ▁US ▁ 2 8 1 ▁and ▁ ▁east ▁of ▁US ▁ 2 8 1 ▁on ▁November ▁ 5 , ▁ 1 9 7 1 . ▁ ▁J unction ▁list ▁ ▁FM ▁ 2 1 4 7 ▁( 1 9 5 3 ) ▁ ▁FM ▁ 2 1 4 7 ▁was ▁designated ▁on ▁October ▁ 2 8 , ▁ 1 9 5 3 , ▁running