Washington 121
Washington 121
| Termini | I-5 at exit 99, looping through Millersylvania State Park, and then back to I-5 at exit 95, at south of Olympia. |
| Length | 7.6 miles |
| "Where does it go?" | Road to Millersylvania State Park from I-5. |
| SB Miles | Southbound down | Northbound up | NB Miles | Google™ | Multiplex | Near City or Town |
County |
| 0.0 |
 |
7.6 |
  |
93rd Ave SW | Olympia | Thurston | |
| 0.3 | Kimmie St SW | 7.2 |
|
||||
| 1.3 |
93rd
Ave SW Tilley Rd S |
6.2 |
|
Tilley Rd
S 93rd Ave SW |
|||
| 3.4 | 113th Ave SW | 4.2 |
|
Tilley Rd S | |||
| 4.0 | Millersylvania State Park | 3.6 |
|
||||
| 5.1 |
Tilley
Rd S Maytown Rd SW |
2.5 |
|
Maytown
Rd SW Tilley Rd S |
|||
| 7.6 |  |
0.0 |
|
Maytown Rd SW | |||
Highways of
Washington State - State Route 121
Washington
State Legislation - Route 121