1 ► Idaho, Ada County, Boise — 72 — Airmail Service

On Campus Lane, 0.1 miles west of Broadway Avenue (U.S. 20/26), on the left when traveling west. Reported permanently removed.

2 ► Idaho, Ada County, Boise — 376 — Arrowrock Dam —

On State Highway 21 at milepost 17,, 0.2 miles south of Arrowrock Road, on the right when traveling north.

3 ► Idaho, Ada County, Boise — 379 — Basque Country —

On Interstate 84 at milepost 62,, 1 mile west of Black's Creek Road, on the right when traveling west.

4 ► Idaho, Ada County, Boise — 359 — Beaver Dick's Ferry —

On Warm Springs Avenue (at milepost 7), 0.1 miles Highland Valley Road, on the left when traveling north.

5 ► Idaho, Ada County, Boise — 402 — Boise State University

On Campus Lane, 0.1 miles west of Broadway Avenue (U.S. 20/26), on the left when traveling west. Reported permanently removed.

6 ► Idaho, Ada County, Boise — 343 — Diversion Dam —

On State Highway 21 at milepost 8,, 0.3 miles east of Warm Springs Avenue, on the right when traveling south.

7 ► Idaho, Ada County, Boise — 318 — More's Creek —

On State Highway 21 at milepost 17,, 0.2 miles south of Arrowrock Road, on the right when traveling north.

8 ► Idaho, Ada County, Boise — 375 — Oregon Trail —

On Interstate 84, 1 mile north of Black's Creek Road, on the right when traveling south.

9 ► Idaho, Ada County, Boise — 151 — The Oregon Trail —

On Warm Springs Avenue (at milepost 7), 0.1 miles south of Highland Valley Road, on the left when traveling north.

10 ► Idaho, Ada County, Meridian — 193 — Initial Point —

On Main Street at Franklin Road, on the right when traveling north on Main Street.

11 ► Idaho, Adams County, Council — 420 — Old Railroads —

On U.S. 95 at milepost 136 at Illinois Avenue, on the right when traveling north on U.S. 95.

12 ► Idaho, Adams County, Meadows — 183 — Packer John's Cabin —

On State Highway 55 at milepost 153,, 0.5 miles west of Woodland Road, on the right when traveling east.

13 ► Idaho, Adams County, Mesa — 374 — Mesa Orchards —

On U.S. 95 at milepost 128,, 0 miles north of Mesa Road, on the right.

14 ► Idaho, Bannock County, Downey — 171 — Red Rock Pass —

On U.S. 91 at milepost 30.2 near South Old Oxford Highway, on the right when traveling north.

15 ► Idaho, Bannock County, Inkom — 17 — Idaho's 1st Railroad —

On Old Highway 91 (Grant Road) near Old Highway 30 West (Business Interstate 15), on the left when traveling north.

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16 ► Idaho, Bannock County, Lava Hot Springs — 13 — Lava Hot Springs —

Near Main Street near U.S. 30, on the right when traveling west.

17 ► Idaho, Bannock County, Pocatello — 503 — Chief Pocatello —

On South 5th Avenue (Business Interstate 15) at South 4th Avenue (U.S. 30), on the left when traveling north on South 5th Avenue.

18 ► Idaho, Bannock County, Pocatello — 289 — Idaho State University —

On South 5th Avenue near East Dillon Street, on the right when traveling north.

19 ► Idaho, Bear Lake County, Bloomington — 319 — British Settlers — Bear Lake — LDS Church —

On National Park Highway/Oregon Trail (U.S. 89), on the right when traveling south.

20 ► Idaho, Bear Lake County, Fish Haven — 384 — Bear Lake —

On U.S. 89 at milepost 2.2 near Loveland Lane, on the left when traveling south.

21 ► Idaho, Bear Lake County, Georgetown — 499 — First Public Building —

On Main Street (U.S. 30) near Stringtown Road, on the right when traveling north.

22 ► Idaho, Bear Lake County, Montpelier — 446 — Bank Robbers —

On Washington Street near North 9th Street.

23 ► Idaho, Bear Lake County, Montpelier — 335 — Big Hill —

On U.S. 30 at milepost 441.7 near Hunters Lane, on the right when traveling west.

24 ► Idaho, Bear Lake County, Montpelier — 456 — McAuley's Road —

On U.S. 30 at milepost 441.7 near Hunters Lane, on the right when traveling west.

25 ► Idaho, Bear Lake County, Montpelier — 159 — Smith's Trading Post —

On U.S. 30 at milepost 440.1 near Bench Road, on the left when traveling west.

26 ► Idaho, Bear Lake County, Montpelier — 157 — Thomas Fork —

On U.S. 30 at milepost 454.5 near Walter Lane, on the right when traveling west.

27 ► Idaho, Bear Lake County, Paris — 275 — Paris —

On South Main Street (U.S. 89) near East 1st South Street, on the right when traveling south.

28 ► Idaho, Bear Lake County, Paris — 386 — Paris Tabernacle —

On South Main Street (U.S. 89 at milepost 15.8) near East 1st South Street, on the right when traveling south.

29 ► Idaho, Benewah County, DeSmet — 248 — DeSmet Mission —

On U.S. 95 at milepost 381 at Old Sanders Road, on the left when traveling north on U.S. 95.

30 ► Idaho, Benewah County, DeSmet — 425 — McCroskey Park —

On U.S. 95 at milepost 381 at Old Sanders Road, on the left when traveling north on U.S. 95.

31 ► Idaho, Benewah County, Saint Maries — 286 — John Mullan —

On State Highway 5, 0.1 miles west of North 23rd Street, on the right when traveling west.

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32 ► Idaho, Benewah County, St. Maries — 42 — Saint Joseph Indian Mission —

On State Highway 3 at milepost 92 near Round Lake Road, on the right when traveling south.

33 ► Idaho, Benewah County, St. Maries — 285 — The Mullan Road —

On State Highway 3 at milepost 96 at State Highway 97, on the right when traveling south on State Highway 3.

34 ► Idaho, Bingham County, Blackfoot — 436 — Big Butte —

On U.S. 20 at Twin Buttes Road, on the right when traveling east on U.S. 20.

35 ► Idaho, Bingham County, Blackfoot — 287 — Lava Formations —

On Interstate 15 at milepost 101.3, on the right when traveling north.

36 ► Idaho, Bingham County, Blackfoot — 428 — Three Buttes —

On U.S. 20 at Twin Buttes Road, on the right when traveling east on U.S. 20.

37 ► Idaho, Blaine County, Bellevue — 413 — Magic Reservoir —

On U.S. 20 at milepost 170 near Rock Creek Road, on the left when traveling west.

38 ► Idaho, Blaine County, Bellevue — 154 — Wood River Mines —

On North Main Street (State Highway 75 at milepost 113) near Kirtley Road, on the right when traveling north.

39 ► Idaho, Blaine County, Carey — 305 — Goodale's Cutoff —

On U.S. 20/26, on the right when traveling west.

40 ► Idaho, Blaine County, Ketchum — 302 — Alexander Ross

On State Highway 75 at milepost 156 near Forest Road 406, on the left when traveling south. Reported permanently removed.

41 ► Idaho, Blaine County, Ketchum — 484 — Galena —

On State Highway 75 at milepost 152 near Forest Road 409, on the right when traveling south.

42 ► Idaho, Blaine County, Ketchum — 292 — Salmon River —

On State Highway 75 at milepost 161 near Salmon River Road (Forest Road 215), on the right when traveling south.

43 ► Idaho, Blaine County, Ketchum — 364 — Sawtooth City —

On State Highway 75 at milepost 167 at Beaver Creek Road (Forest Road 204), on the right when traveling south on State Highway 75.

44 ► Idaho, Blaine County, Ketchum — 329 — Ski Lifts —

On State Highway 75 at milepost 131 near West Sage Road, on the right when traveling south.

45 ► Idaho, Blaine County, Ketchum — 235 — Vienna —

On State Highway 75 at milepost 164 near Forest Road 0777A, on the left when traveling south.

46 ► Idaho, Boise County, Grandjean — 435 — Emile Grandjean —

On State Highway 21 at milepost 95,, 1.4 miles north of Grandjean Road, on the right when traveling north.

47 ► Idaho, Boise County, Horseshoe Bend — 278 — Horse Shoe Bend —

On State Highway 55 at milepost 64, just south of West Boise Street, on the left when traveling south.

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48 ► Idaho, Boise County, Idaho City — 188 — Grimes' Creek —

On State Highway 21 at milepost 28 at Grimes Creek Road, on the left when traveling north on State Highway 21.

49 ► Idaho, Boise County, Idaho City — 186 — Idaho City —

On State Highway 21 at milepost 38,, 0.1 miles west of Lodgepole Lane, on the left when traveling north.

50 ► Idaho, Boise County, Idaho City — 266 — The Old Toll Road —

On State Highway 21 at milepost 20,, 0.2 miles south of Stewart Way, on the left when traveling north.

51 ► Idaho, Boise County, Lowman — 442 — Emma Edwards —

On State Highway 21 at milepost 77,, 0.6 miles east of Kirkham Road, on the right when traveling east.

52 ► Idaho, Boise County, Lowman — 444 — Lowman —

On State Highway 21 at milepost 72,, 0.2 miles east of Banks Lowman Road, on the right when traveling north.

53 ► Idaho, Bonner County, Hope — 148 — Kullyspell House —

On Hope Peninsula Road at 200, on the right when traveling south on Hope Peninsula Road.

54 ► Idaho, Bonner County, Hope — 320 — Lake Pend Oreille —

On State Highway 200, on the right when traveling south.

55 ► Idaho, Bonneville County, Idaho Falls — 224 — Eagle Rock Ferry —

On South Capitol Avenue.

56 ► Idaho, Bonneville County, Idaho Falls — 365 — Elephant Hunters —

On West Arco Highway (U.S. 20 at milepost 291) near North 135 West, on the left when traveling west.

57 ► Idaho, Bonneville County, Idaho Falls — 223 — Taylor's Bridge —

On South Capitol Avenue.

58 ► Idaho, Boundary County, Bonners Ferry — 165 — Bonner's Ferry —

On Chinook Street at U.S. 95, on the right when traveling east on Chinook Street.

59 ► Idaho, Boundary County, Bonners Ferry — 160 — David Thompson —

On U.S. 95 at milepost 504 near Deep Creek Loop (State Highway 2), on the left when traveling north.

60 ► Idaho, Boundary County, Bonners Ferry — 321 — Glacial Lakes —

On U.S. 95 at milepost 504 near Deep Creek Loop (State Highway 2), on the left when traveling north.

61 ► Idaho, Boundary County, Bonners Ferry — 491 — Kootenai Tribe of Idaho —

On Chinook Street at U.S. 95, on the right when traveling east on Chinook Street.

62 ► Idaho, Boundary County, Bonners Ferry — 150 — Wild Horse Trail —

On U.S. 95 at milepost 504 near Deep Creek Loop (State Highway 2), on the left when traveling north.

63 ► Idaho, Butte County, Arco — 152 — Atoms for Peace —

On W. Grand Ave south of S. Bingham Street, on the right when traveling north.

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64 ► Idaho, Butte County, Arco — 304 — Lost River —

Near U.S. 20 at milepost 265,, 1.2 miles west of Van Buren Boulevard, on the right when traveling east.

65 ► Idaho, Butte County, Arco — 297 — Nuclear Reactors —

Near U.S. 20 at milepost 265,, 1.2 miles west of Van Buren Boulevard, on the right when traveling east.

66 ► Idaho, Butte County, Howe — 227 — John Day’s River —

On State Highway 33 at N 1480W (County Highway 1480), on the right when traveling west on State Highway 33.

67 ► Idaho, Camas County, Fairfield — 277 — Bannock War —

On U.S. 20 at milepost 148 near Washington/Wheat Ranch Road, on the left when traveling west.

68 ► Idaho, Canyon County, Caldwell — 455 — Emigrant Crossing —

On U.S. 30, 0 miles east of West Plymouth Road, on the right when traveling east.

69 ► Idaho, Canyon County, Caldwell — 291 — The College of Idaho

On Cleveland Boulevard at South 20th Avenue, on the right when traveling east on Cleveland Boulevard. Reported missing.

70 ► Idaho, Canyon County, Givens Hot Springs — 358 — Givens Springs —

Near Marsing Murphy Road (State Highway 78) 0.2 miles east of Poplar Drive, on the right when traveling east.

71 ► Idaho, Canyon County, Middleton — 75 — The Ward Massacre —

On Lincoln Road, 0.2 miles east of Middleton Road, on the left when traveling east.

72 ► Idaho, Canyon County, Nampa — 415 — Northwest Nazarene University —

On 16th Avenue at Garrity Boulevard, on the right when traveling south on 16th Avenue.

73 ► Idaho, Canyon County, Notus — 361 — Lower Boise —

On U.S. 20/26 just east of Notus Road, on the left when traveling west.

74 ► Idaho, Canyon County, Parma — 78 — Marie Dorion —

On Parma Road, 0 miles Parma Road, on the left when traveling west.

75 ► Idaho, Canyon County, Parma — 85 — Old Fort Boise —

On Parma Road, 0 miles west of Parma Rd., on the left when traveling north.

76 ► Idaho, Caribou County, Bancroft — 337 — Chesterfield —

On U.S. 30 at milepost 378.8 near Lund Road, on the right when traveling west.

77 ► Idaho, Caribou County, Bancroft — 161 — Hudspeth's Cutoff —

On U.S. 30 at milepost 376.2 near Lundgren Canyon Road, on the left when traveling west.

78 ► Idaho, Caribou County, Soda Springs — 220 — Bear River Lava —

On Soda Point Power Plant Road near Reservoir Road, on the right when traveling south.

79 ► Idaho, Caribou County, Soda Springs — 218 — Camp Connor —

On U.S. 30 near South 3rd Street West, on the left when traveling west.

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80 ► Idaho, Caribou County, Soda Springs — 385 — Hooper Spring —

On East 2nd Street South near South Main Street, on the right when traveling west.

81 ► Idaho, Caribou County, Soda Springs — 219 — John Bidwell —

On Soda Point Power Plant Road near Reservoir Road, on the right when traveling south.

82 ► Idaho, Caribou County, Soda Springs — 158 — Soda Springs —

On U.S. 30 near South 3rd Street West, on the left when traveling west.

83 ► Idaho, Caribou County, Wayan — 433 — Cariboo Mountain —

On Wayan Loop Road (State Highway 34) near Wayan Loop Road, on the right when traveling east.

84 ► Idaho, Caribou County, Wayan — 362 — John Grey —

On Wayan Loop Road (State Highway 34) near Wayan Loop Road, on the right when traveling west.

85 ► Idaho, Cassia County, Albion — 490 — Albion State Normal School —

On State Highway 77 at East Miller Hall Court, on the left when traveling north on State Highway 77.

86 ► Idaho, Cassia County, Albion — 306 — Diamondfield Jack —

On State Highway 77 at milepost 18,, 0.2 miles south of North St., on the right when traveling north.

87 ► Idaho, Cassia County, Burley — 208 — Milner Dam —

On U.S. 30 at milepost 250,, 0.2 miles east of S 800 W, on the left when traveling east.

88 ► Idaho, Cassia County, Burley — 28 — Starrh's Ferry —

On U.S. 30 at milepost 253,, 0.2 miles east of West 7 South, on the left when traveling east.

89 ► Idaho, Cassia County, Delco — 449 — Idahome —

On State Highway 81 at milepost 8 near Idahome Road, on the right when traveling south.

90 ► Idaho, Cassia County, Malta — 169 — Hudspeth's Cutoff —

On State Highway 77 at milepost 3,, 0.6 miles east of 1700 S. Road, on the right when traveling east.

91 ► Idaho, Cassia County, Oakley — 344 — City of Rocks —

On State Highway 27 at milepost 1,, 0.2 miles north of 1800 South Road, on the right when traveling south.

92 ► Idaho, Clark County, Dubois — 427 — Nez Perce War —

On A-2 Clark County Road (Main Street) near Interstate 15, on the left when traveling east.

93 ► Idaho, Clark County, Spencer — 222 — Beaver Canyon —

Near West Camas Creek Road (Forest Road 006) near Interstate 15, on the left when traveling east.

94 ► Idaho, Clearwater County, Lenore — 316 — Indian Houses —

Near U.S. 12 at milepost 27 near Rapidview Lane, on the left when traveling east.

95 ► Idaho, Clearwater County, Lenore — 486 — Lenore Tram —

On U.S. 12 at Summit Grade, on the left when traveling west on U.S. 12.

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96 ► Idaho, Clearwater County, Lenore — 250 — Slaterville — Served as the steamboat port for the Clearwater Gold Rush — which followed mineral discoveries at Pierce in 1860 —

On U.S. 12, 0.6 miles west of Lenore Grade, on the right.

97 ► Idaho, Clearwater County, Orofino — 249 — Lewis and Clark — On their way West, in 1805 — Lewis and Clark descended into Clearwater Canyon on an old Indian trail across from here —

On U.S. 12, 3 miles south of Michigan Avenue, on the right when traveling west.

98 ► Idaho, Clearwater County, Pierce — 153 — Canal Gulch —

On Main Street (State Highway 11 at milepost 29) at Canal Street, on the right when traveling west on Main Street.

99 ► Idaho, Clearwater County, Pierce — 307 — Chinese Hanging —

On State Highway 11 at milepost 27 near Fromelt Road, on the left when traveling east.

100 ► Idaho, Clearwater County, Pierce — 156 — Oro Fino City —

On State Highway 11 at milepost 28 near Fromelt Road, on the left when traveling east.

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