If the live Google Map is not visible a static map is available here.
Route 1 (18 miles) (Two lane highway)
1. Take the 240 Bypass north 4.2 miles to Highway 240
2. Turn left at Highway 240, head northwest for 8.3 mi
3. Turn right at Horn Rd (Highway 225), head northeast for 5.2 mi
4. Turn left at the LIGO entrance, drive 0.3 mi and turn left into the visitor center
Route 2 (20 miles) (Four lane highway)
1. Take the 240 Bypass north 4.2 miles to Stevens Drive
2. Head north/northeast on Stevens Dr for 13.9 mi
3. Turn left at Horn Rd, just before the Wye Barricade/Hanford Security Gate
4. Head south on Horn Rd 1.7 mi
5. Turn right at the LIGO entrance, drive 0.3 mi and turn left into the visitor center
A printable map and directions are available here.