| 1 | Boulder River | Class III - 4.5 miles long (McLeod to Highway bridge)
| Sweet Grass County |
| 2 | Boulder River | Class V+ - 1 miles long (Boulder Falls to Highway)
| Sweet Grass County |
| 3 | Boulder River | Class II-III - 9 miles long (Chippy Park Campground to Boulder Falls)
| Sweet Grass / Park County |
| 4 | Boulder River | Class III-IV - 5 miles long (Speculator Creek to Chippy Park Campground)
| Sweet Grass County |
| 5 | Boulder River | Class III-V - 4 miles long (Fourmile to Speculator Creek)
| Sweet Grass / Park County |
| 6 | Boulder River - East | Class I-II - 12 miles long (Headwaters to Boulder River)
| Sweet Grass County |
| 7 | Boulder River - West | Class II-III - 14 miles long (Gallatin National Forest boundary to Boulder River)
| Park Sweet Grass County |
| 8 | Clarks Fork Yellowstone | Class IV - 3 miles long (Trailhead to State line)
| Park County |
| 9 | Clarks Fork Yellowstone River | Class III-V - 4.2 miles long (Upper)
| Park County |
| 10 | Clarks Fork Yellowstone River | Class IV-V+ - 2.6 miles long (Honeymoon)
| Park County |
| 11 | Clarks Fork Yellowstone River | Class V+ - 22.9 miles long (Box)
| Park County |
| 12 | Clarks Fork Yellowstone River | Class III-V - 3 miles long (Lower)
| Park County |
| 13 | Crandall Creek | Class III-V - 4 miles long (Trailhead to Clarks Fork Yellowstone Rail Road)
| Park County |
| 14 | Greybull River | Class I-III - 6 miles long (Venus Creek to Forest Service boundary)
| Park County |
| 15 | Rock Creek | Class II-IV - 10 miles long (Lake Fork to Red Lodge)
| Carbon County |
| 16 | Rosebud Creek - East | Class IV-V - 6 miles long (Lake to Sand Dunes Campground)
| Carbon County |
| 17 | Rosebud Creek - West | Class III-IV+(V) - 3 miles long (Emerald Lake to Pine Grove Campground)
| Stillwater County |
| 18 | Shoshone River | Class II-V - 8.1 miles long (Buffalo Bill Dam to Highway 120)
| Park County |
| 19 | Shoshone River - North Fork | Class I-III - 40 miles long (Pahaska Tepee to Buffalo Bill Reservoir)
| Park County |
| 20 | Shoshone River - South Fork | Class II-IV - 13 miles long (East Fork Creek to Trailhead)
| Park County |
| 21 | Stillwater River | Class I-III - 11.8 miles long (Buffalo Jump to Cliff Swallow)
| Stillwater County |
| 22 | Stillwater River | Class I-V - 3.5 miles long (Woodbine Campground to below Chrome Mine)
| Stillwater County |
