Clarks Fork Creek
| Clarks Fork Creek Tributary to South Fork Grand River  | |
|---|---|
| Location | |
| Country | United States | 
| State | South Dakota | 
| Counties | Harding | 
| Physical characteristics | |
| Source | North Fork Moreau River divide | 
| • location | about 12 miles south-southwest of Buffalo, South Dakota | 
| • coordinates | 45°24′36.98″N 103°36′31.70″W / 45.4102722°N 103.6088056°W | 
| • elevation | 3,210 ft (980 m) | 
| Mouth | South Fork Grand River | 
 • location  | about 10 miles east-northeast of Buffalo, South Dakota | 
 • coordinates  | 45°36′59.99″N 103°20′36.66″W / 45.6166639°N 103.3435167°W | 
 • elevation  | 2,720 ft (830 m) | 
| Length | 27.74 mi (44.64 km) | 
| Basin size | 248.20 square miles (642.8 km2) | 
| Discharge | |
| • location | South Fork Grand River | 
| • average | 17.04 cu ft/s (0.483 m3/s) at mouth with South Fork Grand River | 
| Basin features | |
| Progression | South Fork Grand River → Grand River → Missouri River → Mississippi River → Gulf of Mexico | 
| River system | Grand River | 
| Tributaries | |
| • left | Buffalo Creek | 
| • right | Slim Buttes Creek Sioux Creek  | 
| Bridges | unnamed road (x2), US 85, JB Road, SD 20 | 
Clarks Fork Creek, also called Clarks Fork or Sand Creek, is a stream in Harding County, South Dakota, United States. It is a tributary of Grand River.
Clarks Fork Creek was named after Dorr Clark, a local rancher who established the headquarters of a cattle outfit about one mile northeast of the mouth of the stream.