The highway leaves the city of North Las Vegas shortly after just before SR 604 ends at Interstate 15 at exit 58 near Apex.

The I-15 frontage road stretching northeast 11.823 miles (19.027 km) from Apex to a point between Garnet and Crystal is also state maintained as FRCL07,[1] and was mileposted as SR 604.

However, it has been truncated over time, as segments were given to the city of Las Vegas and Clark County to maintain.

The portion of Las Vegas Boulevard between Tonopah Avenue and Carey Street was turned over to local control by 2017.

From the mid-1980s to 2005, this highway was used as the course for the start and a significant portion of the Las Vegas Marathon.