Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| East Fork Pass | Gap | 1693 | Mineral | 47 29 27 N | 115 31 28 W |
| East Fork Pass | Gap | 1604 | Sanders | 47 29 09 N | 115 29 60 W |
| East Fork Pasture Creek | Stream | | Dawson | 47 37 12 N | 105 08 44 W |
| East Fork Peak | Summit | 1742 | Lincoln | 48 14 60 N | 116 02 46 W |
| East Fork Peet Creek | Stream | | Beaverhead | 44 34 52 N | 112 04 01 W |
| East Fork Pentagon Creek | Stream | | Flathead | 47 53 26 N | 113 08 26 W |
| East Fork Peterson Creek | Stream | | Park | 45 40 30 N | 110 15 03 W |
| East Fork Petty Creek | Stream | | Missoula | 46 50 59 N | 114 26 17 W |
| East Fork Pipe Creek | Stream | | Lincoln | 48 36 58 N | 115 37 09 W |
| East Fork Pole Creek | Stream | | Beaverhead | 45 21 37 N | 113 11 34 W |
| East Fork Pole Creek | Stream | | Madison | 45 32 13 N | 111 29 02 W |
| East Fork Poplar River | Stream | | Daniels | 48 49 41 N | 105 26 56 W |
| East Fork Porcupine Creek | Stream | | Valley | 48 20 32 N | 106 24 02 W |
| East Fork Post Office (historical) | Post Office | 895 | Garfield | 46 56 20 N | 106 44 49 W |
| East Fork Prairie Elk Creek | Stream | | McCone | 47 41 34 N | 105 51 36 W |
| East Fork Pryor Creek | Stream | | Yellowstone | 45 43 24 N | 108 18 07 W |
| East Fork Quartz Creek | Stream | | Madison | 45 29 53 N | 112 02 38 W |
| East Fork Rattlesnake Creek | Stream | | Missoula | 46 58 37 N | 113 50 20 W |
| East Fork Razor Creek | Stream | | Yellowstone | 46 06 25 N | 108 23 57 W |
| East Fork Red Rock Creek | Stream | | Jefferson | 46 16 57 N | 112 19 57 W |
| East Fork Reservation Creek | Stream | | Rosebud | 46 07 60 N | 106 54 51 W |
| East Fork Reservoir | Reservoir | 1844 | Granite | 46 07 51 N | 113 22 52 W |
| East Fork Reservoir | Reservoir | 866 | Rosebud | 46 28 39 N | 106 30 13 W |
| East Fork Reservoir | Reservoir | 1106 | Rosebud | 45 24 24 N | 106 16 02 W |
| East Fork Reservoir Dam | Dam | 868 | Rosebud | 46 28 42 N | 106 30 14 W |
| East Fork Revais Creek | Stream | | Sanders | 47 14 22 N | 114 23 59 W |
| East Fork Roberts Creek | Stream | | Wheatland | 46 30 32 N | 109 38 13 W |
| East Fork Rock Creek | Stream | | Fergus | 46 49 02 N | 109 30 00 W |
| East Fork Rock Creek | Stream | | Granite | 46 12 01 N | 113 30 00 W |
| East Fork Rock Creek | Stream | | Park | 45 58 32 N | 110 20 30 W |
| East Fork Ruby River | Stream | | Madison | 44 54 42 N | 111 59 55 W |
| East Fork Saint Louis Creek | Stream | | Missoula | 47 15 06 N | 114 41 22 W |
| East Fork Salt Creek | Stream | | Fergus | 47 27 55 N | 109 28 03 W |
| East Fork Sand Coulee Creek | Stream | | Cascade | 47 16 54 N | 111 05 31 W |
| East Fork Sand Creek | Stream | | McCone | 47 54 20 N | 105 39 16 W |
| East Fork Sarpy Creek | Stream | | Big Horn | 45 52 42 N | 107 06 54 W |
| East Fork School (historical) | School | 1300 | Sweet Grass | 45 53 58 N | 109 43 14 W |
| East Fork Shane Creek | Stream | | Stillwater | 45 32 03 N | 109 13 53 W |
| East Fork Smith Creek | Stream | | Meagher | 46 12 49 N | 110 31 41 W |
| East Fork Snow Coulee | Valley | | Valley | 48 36 04 N | 106 15 26 W |
| East Fork Specimen Creek | Stream | | Park | 45 01 42 N | 111 02 31 W |
| East Fork Spread Creek | Stream | | Powell | 47 07 54 N | 113 07 36 W |
| East Fork Spring | Spring | 1147 | Powder River | 45 37 60 N | 105 59 31 W |
| East Fork Spring Creek | Stream | | Cascade | 47 07 53 N | 111 26 30 W |
| East Fork Spring Creek | Stream | | Meagher | 46 33 59 N | 110 27 19 W |
| East Fork Spring Creek | Stream | | Park | 45 51 52 N | 110 34 57 W |
| East Fork Stiner Creek | Stream | | Judith Basin | 46 52 37 N | 110 31 02 W |
| East Fork Stinky Creek | Stream | | Phillips | 48 39 35 N | 107 24 53 W |
| East Fork Strawberry Creek | Stream | | Flathead | 48 03 51 N | 113 01 51 W |
| East Fork Sunday Creek | Stream | | Flathead | 48 32 35 N | 114 51 29 W |
| East Fork Swamp Creek | Stream | | Sanders | 47 28 21 N | 114 59 23 W |
| East Fork Sweet Grass Creek | Stream | | Sweet Grass | 45 53 41 N | 109 43 44 W |
| East Fork Swift Creek | Stream | | Flathead | 48 41 10 N | 114 35 04 W |
| East Fork T L Creek | Stream | | Carter | 45 19 17 N | 104 43 01 W |
| East Fork Tepee Creek | Stream | | Gallatin | 44 52 05 N | 111 07 24 W |
| East Fork Third Creek | Stream | | Powder River | 45 22 14 N | 105 26 28 W |
| East Fork Thompson Creek | Stream | | Beaverhead | 45 47 14 N | 113 29 53 W |
| East Fork Timber Creek | Stream | | Fergus | 46 44 10 N | 109 28 22 W |
| East Fork Timber Creek | Stream | | Mineral | 47 23 43 N | 115 24 39 W |
| East Fork Trailhead | Locale | 1644 | Ravalli | 45 54 27 N | 113 42 14 W |
| East Fork Trailhead | Locale | 1667 | Ravalli | 45 54 31 N | 113 42 15 W |
| East Fork Trout Creek | Stream | | Sanders | 47 48 18 N | 115 43 06 W |
| East Fork Tullock Creek | Stream | | Big Horn | 45 45 18 N | 107 17 53 W |
| East Fork Twelvemile Creek | Stream | | Mineral | 47 22 02 N | 115 15 52 W |
| East Fork Twin Lakes Creek | Stream | | Deer Lodge | 46 06 54 N | 113 12 29 W |
| East Fork Upper Deer Creek | Stream | | Sweet Grass | 45 33 41 N | 109 59 28 W |
| East Fork Valley Creek | Stream | | Sanders | 47 11 05 N | 114 12 47 W |
| East Fork Wallace Creek | Stream | | Park | 45 13 05 N | 110 28 49 W |
| East Fork Warm Springs Creek | Stream | | Beaverhead | 45 31 05 N | 113 17 20 W |
| East Fork Warm Springs Creek | Stream | | Granite | 46 15 39 N | 113 08 12 W |
| East Fork Wayne Creek | Stream | | Blaine | 48 38 39 N | 108 41 51 W |
| East Fork West Boulder River | Stream | | Park | 45 23 41 N | 110 24 51 W |
| East Fork West Red Lodge Creek | Stream | | Carbon | 45 15 34 N | 109 26 53 W |
| East Fork Whitewater Creek | Stream | | Phillips | 48 45 05 N | 107 37 24 W |
| East Fork Wolf Creek | Stream | | Powder River | 45 29 45 N | 105 33 05 W |
| East Fork Wolf Creek | Stream | | Sheridan | 48 16 12 N | 105 47 08 W |
| East Fork Woods Creek | Stream | | Pondera | 48 17 36 N | 113 12 20 W |
| East Fork Woody Creek | Stream | | Garfield | 47 28 22 N | 106 25 43 W |
| East Fork Yaak River | Stream | | Lincoln | 48 57 08 N | 115 36 57 W |
| East Forty Creek | Stream | | Custer | 46 02 24 N | 105 15 24 W |
| East Gallatin Cemetery | Cemetery | 1336 | Gallatin | 45 50 31 N | 111 07 59 W |
| East Gallatin Post Office (historical) | Post Office | 1335 | Gallatin | 45 49 20 N | 111 07 23 W |
| East Gallatin Recreation Area | Park | 1433 | Gallatin | 45 42 18 N | 111 02 30 W |
| East Gallatin River | Stream | | Gallatin | 45 53 30 N | 111 20 01 W |
| East Gallatin School (historical) | School | 1333 | Gallatin | 45 49 15 N | 111 07 28 W |
| East Gate Shopping Center | Locale | 978 | Missoula | 46 52 04 N | 113 58 53 W |
| East Gilbert Creek | Stream | | Garfield | 47 42 04 N | 106 33 11 W |
| East Glacier Park | Populated Place | 1462 | Glacier | 48 26 29 N | 113 13 05 W |
| East Glacier Park Branch Library | Building | 1463 | Glacier | 48 26 34 N | 113 13 04 W |
| East Glacier Park Cemetery | Cemetery | 1526 | Glacier | 48 27 38 N | 113 13 43 W |
| East Glacier Park Fire Department | Building | 1462 | Glacier | 48 26 29 N | 113 13 05 W |
| East Glacier Park Post Office | Post Office | 1459 | Glacier | 48 26 30 N | 113 12 58 W |
| East Glacier Park School | School | 1459 | Glacier | 48 26 24 N | 113 13 03 W |
| East Glacier Park Village | Populated Place | 1470 | Glacier | 48 26 49 N | 113 13 23 W |
| East Glenwood School (historical) | School | 1592 | Broadwater | 46 18 20 N | 111 15 47 W |
| East Goat Mountain | Summit | 2777 | Powell | 46 23 05 N | 113 01 30 W |
| East Goat Peak | Summit | 3167 | Deer Lodge | 45 57 22 N | 113 22 47 W |
| East Gray Rock Mine | Mine | 1869 | Silver Bow | 46 01 28 N | 112 31 43 W |
| East Hammond Creek | Stream | | Madison | 45 20 56 N | 111 31 11 W |
| East Hardscrabble Creek | Stream | | Richland | 48 02 23 N | 104 33 01 W |
| East Helena | Locale | 1187 | Lewis and Clark | 46 35 17 N | 111 55 26 W |
| East Helena | Populated Place | 1185 | Lewis and Clark | 46 35 23 N | 111 54 56 W |
| East Helena Cemetery | Cemetery | 1180 | Lewis and Clark | 46 35 40 N | 111 54 55 W |
| East Helena Family Life Center | Church | 1183 | Lewis and Clark | 46 35 30 N | 111 54 30 W |
| East Helena Fire Department | Building | 1185 | Lewis and Clark | 46 35 23 N | 111 54 56 W |
| East Helena Police Department | Building | 1185 | Lewis and Clark | 46 35 23 N | 111 54 56 W |
| East Helena Post Office | Post Office | 1183 | Lewis and Clark | 46 35 23 N | 111 55 25 W |
| East Helena United Methodist Church | Church | 1185 | Lewis and Clark | 46 35 25 N | 111 54 41 W |
| East Hill | Summit | 1869 | Granite | 46 40 07 N | 113 35 02 W |
| East Hill Coulee | Valley | | Garfield | 47 38 42 N | 107 13 31 W |