I-84 East Exit 57 Offramp at ID-21
I-84 East Exit 57 Offramp at ID-21. Turn left for ID-21 east to Idaho City; turn right for Gowen Road.
ID-21 North - Distance Marker
First distance marker on ID-21 North to Idaho City, Lowman, and Stanley.
End ID-21 South at I-84 in Boise
End ID-21 South at I-84 in Boise. Use right lanes for I-84 West; left lanes for I-84 East and for Gowen Road.