| Alder Creek | |
| Name Other: | Tributary to San Luis Creek |
| Map Size: | 300 |
| Pushpin Map: | USA Colorado#USA |
| Pushpin Map Size: | 300 |
| Pushpin Map Caption: | Location of Alder Creek mouth |
| Pushpin Map Alt: | Map of Alder Creek mouth location |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | State |
| Subdivision Name2: | Colorado |
| Subdivision Type3: | County |
| Subdivision Name3: | Saguache |
| Length: | 5.06miles[1] |
| Discharge1 Location: | San Luis Creek |
| Discharge1 Avg: | 0.8cuft/s at mouth with San Luis Creek[2] |
| Source1: | Bear Creek divide |
| Source1 Location: | about 0.5 miles east of Round Mountain |
| Source1 Coordinates: | 38.3342°N -106.1008°W[3] |
| Source1 Elevation: | 11080feet[4] |
| Mouth: | San Luis Creek |
| Mouth Location: | about 0.5 miles east of Alder, Colorado |
| Mouth Coordinates: | 38.3717°N -106.0319°W |
| Mouth Elevation: | 8448feet[5] |
| Progression: | San Luis Creek |
| River System: | San Luis Creek |
| Tributaries Left: | unnamed tributaries |
| Tributaries Right: | unnamed tributaries |
| Bridges: | US 285, County Road UU5 |
Alder Creek is a stream entirely within Saguache County, Colorado.
Alder Creek was named for the alder trees lining its course.[6]