| Thunder Mountain | |
| Elevation Ft: | 11441 |
| Elevation Ref: | [1] |
| Prominence Ft: | 515 |
| Isolation Mi: | 1.15 |
| Isolation Ref: | [2] |
| Parent Peak: | Beartooth Mountain |
| Map: | Montana#USA |
| Map Size: | 270 |
| Label Position: | top |
| Country: | United States |
| State: | Montana |
| Region: | Carbon |
| Region Type: | County |
| Part Type: | Protected area |
| Part: | Absaroka–Beartooth Wilderness |
| Range: | Beartooth Mountains Rocky Mountains |
| Coordinates: | 45.0732°N -109.5482°W |
| Coordinates Ref: | [3] |
| Topo: | USGS Silver Run Peak |
Thunder Mountain is an 11441abbr=offNaNabbr=off summit in Carbon County, Montana, United States.
Thunder Mountain is located 17miles southwest of Red Lodge, Montana, in the Beartooth Mountains which are a subrange of the Rocky Mountains.[1] It is set within the Absaroka–Beartooth Wilderness on land managed by Custer-Gallatin National Forest.[2] The mountain ranks as the 52nd-highest peak in Montana.[2] Precipitation runoff from the mountain's slopes drains into Lake Fork → Rock Creek → Clarks Fork Yellowstone River → Yellowstone River. Topographic relief is significant as the summit rises 2600abbr=offNaNabbr=off above Lake Fork in 0.75miles. The mountain's toponym has been officially adopted by the United States Board on Geographic Names.[3]
Based on the Köppen climate classification, Thunder Mountain is located in a subarctic climate zone characterized by long, usually very cold winters, and mild summers.[4] Winter temperatures can drop below 0 °F with wind chill factors below −10 °F.