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Idaho Highway Historical Marker Signs

There are approximatly 266 historical marker signs along Idaho's highways and byways.
Links are provided to pages with pictures,text and coordinates of signs where available.
Last Update:

LINKS LISTED BY HIGHWAY
This is an attempt to organize them and present them in a simple, easier way to find.




I-15 I-84 I-86 I-90


ID-3 ID-4 ID-5 ID-6 ID-11 ID-13
ID-14
ID-16
ID-21
ID-24
ID-25 ID-27
ID-28 ID-29
ID-33
ID-34
 ID-38 ID-39 ID-45 ID-50

ID-52 ID-53 ID-54 ID-55 ID-71 ID-75 ID-77 ID-78

US-2 US-12 US-20 US-30 US-89 US-91 US-93 US-95


 

















US-95

Sign # and Name

#38 - Nez Perce War #78 - Marie Dorian #85 - Old Fort Boise #100 - Camas Prairie
#112 - Lapwai Mission #150 - Wild Horse Trail #160 - David Thompson #163 -  Lawyer's Canyon
#165 - Bonner's Ferry
#167 - The First Capital
#174 - Fabulous Florence
#175 - Hydraulic Mining
#176 - Mackenzie's Post
#192 - Owyhee Country #248 - Desmet Mission
#262 - Coyote's Fishnet
#279 - University of Idaho
#293 - An Early Industry #294 - Nez Perce War
#298 - Salmon River
#308 - William Craig
#313 - Salmon River Canyon
#314 - Lewis Clark State
#321 - Glacial Lakes
#324 - Francois Payette #327 - White Bird Grade #331 - Craigmont #1 & #2 #332 - Nez Perce Village
#349 - Saint Joseph's Mission #371 - Railroad Trestles #374 - Mesa Orchards #417 - Lewiston Hill
#418 - Steamboats #419 - Railroad Tunnels #420 - Old Railroads #425 - McCroskey Park
#487 - 11,000 Years Occupation #488 - Lewis and Clark #489 - Lewis and Clark #491 - Kootenai Tribe of Idaho
#500 - Nez Perce War







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US-93

Sign # and Name


#45 - Mount Borah
#122 - Lewis and Clark
#125 - Historic Lemhi County
#152 - Atoms for Peace
#172 - Shoshone Falls #229 - Goddin's River #240 - Salmon Dam #241 - Fort Bonneville
#243 - Gibbonsville #269 - Lewis and Clark #303 - Michel Bourdon #326 - Emigrant Road
#354 - Goodale's Cutoff #356 - Earthquakes #411 - CSI #412 - Shoshone Historic
#448 - Nez Perce Trail #507 - Idaho Hermits #508 - Mount McCALEB
#509 - GOST TOWNS OF MACKAY

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US-91

Sign # and Name


#23 - Idaho's Oldest Town
#171 - Red Rock Pass #216 - Bear River Battle #257 - Utah Northern Railway
#388 - Hatch House



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US-89

Sign # and Name


#275 - Paris
#319 - British Settlers
#384 - Bear Lake
#386 - Paris Tabernacle
#446 - Bank Robbers





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US-30
Sign # and Name


#13 - Lava Hot Springs
#28 - Starrh's Ferry
#157 - Thomas Fork
#158 - Soda Springs
#159 - Smith's Trading Post
#161 - Hudspeth's Cutoff
#166 - Thousand Springs
#204 - Salmon Falls
#206 - Payne's Ferry
#208 - Milner Dam
#218 - Camp Connor
#219 - John Bidwell
#220 - Bear River Lava
#284 - Caldron Linn
#300 - Fossil Beds
#330 - Fishing Falls
#335 - Big Hill
#337 - Chesterfield
#342 - Rock Creek Station
#385 - Hooper Spring
#456 - McAuley's Road
#483 - New Plymouth
#499 - First Public Building


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US-20
Sign # and Name


#72 - Airmail Service
#75 - The Ward Massacre #195 - Rattlesnake Station #197 - Toll Gate
#135 - Fort Henry #267 - The Three Tetons #277 - Bannock War
#297 - Nuclear Reactors
#304 - Lost River
#305 - Goodale's Cutoff
#353 - Castle Rock
#361 - Lower Boise
#365 - Elephant Hunters
#391 - Caldera Lookout
#396 - Volcanic Calderas
#400 - Gold Mines
#402 - Boise State University #413 - Magic Reservoir #428 - Three Buttes #436 - Big Butte
#452 - Pierre J. DeSmet #461 - Harriman Wildlife #462 - Harriman State Park





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ID-200
Sign # and Name


#148 - Kullyspell House
 #320 - Lake Pend Oreille 

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ID-162
Sign # and Name


#372 - Camas Prairie 
#492 - Lewis and Clark

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ID-97
Sign # and Name


#170 - Coeur d'Alene Lake
#281 - Submerged Valley



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ID-87
Sign # and Name


#389 - Sawtell's Ranch

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ID-81
Sign # and Name


#449 - Idahome   

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ID-78
Sign # and Name


#196 - Bannock War
#358 - Givens Springs
#380 - War Eagle Mines
#454 - Diamond Gulch

#493 - The Utter Disaster  





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ID-77
Sign # and Name

#169 - Hudspeth's Cutoff
#306 - Diamondfield Jack 
#490 - Albion Normal College

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ID-75
Sign # and Name


#154 - Wood River Mines 
#235 - Vienna Ghost Town 
#292 - Salmon River 
#302 - Alexander Ross
#328 - Bears Ploughed Field
#329 - Ski Lifts
#364 - Sawtooth City 
#398 - Magic Dam 
#406 - Stanley Ranger Station
#416 - Clayton Smelter
#434 - Bison Jump
#484 - Galena

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ID-71
Sign # and Name


#185 - Brownlee Ferry
#378 - Seven Devils Mines

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ID-55
Sign # and Name


#155 - Long Valley Ambush 
#183 - Packer John's Cabin
#278 - Horse Shoe Bend 
#283 - Froman's Ferry
#496 - Splash Dams




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ID-54
Sign # and Name


#350 - Farragut State Park
#351 - Pend Oreille City
#422 - Bayview Limekilns

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ID-53
Sign # and Name


#256 - Purcell Trench

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ID-52
Sign # and Name


#377 - Black Canyon Dam

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ID-50
Sign # and Name


#393 - Hansen Bridge

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ID-45
Sign # and Name


#194 - Steamer Shoshone

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ID-39
Sign # and Name


#383 - American Falls


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ID-38
Sign # and Name

#282 - Twin Springs




ID-34
Sign # and Name


#362 - John Grey 
#431 - Range Wars
#432 - Old Delta Sediments 
#433 - Cariboo Mountain

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ID-33
Sign # and Name


#139 - Pierre's Hole #225 - John Colter #227 - John Day's River #273 - Beaver Dick
#301 - Menan Buttes  #315 - Teton Range #345 - Teton Flood #404 - BYU of Idaho





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ID-29
Sign # and Name


#238 - Bannock Pass

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ID-28
Sign # and Name


#127 - Lewis and Clark 
#128 - Fort Lemhi
#234 - Gilmore 
#239 - Sacajawea
#270 - Prehistoric Man
#296 - Charcoal Kilns 
#312 - MacDonald's Battle 
#325 - Lewis and Clark
#429 - Cote's Defile




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ID-27
Sign # and Name


#344 - City of Rocks 

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ID-25
Sign # and Name


#276 - Prehistoric Man
#340 - Hunt    
#506 - Camp Rupert 1943-1946

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ID-24
Sign # and Name


#341 - Minidoka Dam 

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ID-21
Sign # and Name


#151 - The Oregon Trail   
#186 - Idaho City
#188 - Grimes' Creek
#266 - The Old Toll Road
#318 - More's Creek 




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ID-16
Sign # and Name


#295 - Freezeout Hill
#447 - Pearl

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ID-14
Sign # and Name


#168 - Elk City
#369 - Nez Perce Trail

 

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ID-13
Sign # and Name


#259 - Nez Perce War
#352 - Mount Idaho
#441 - Harpster
#485 - Elk City Wagon Road

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US-12
Sign # and Name


#111 - Spalding's Mission
#247 - Lolo Summit
#249 - Lewis and Clark
#250 - Slaterville
#264 - Ant and Yellowjacket
#309 - Asa Smith Mission
#310 - Long Camp
#316 - Indian Houses
#333 - Whitehouse Pond
#334 - Lolo Trail Crossing
#466 - Gold Rush Ferry
#486 - Lenore Tram
#495 - Tsceminicum
#501 - 18th St. Bridge
#502 - John Silcott


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ID-11
Sign # and Name


#153 - Canal Gulch
#156 - Oro Fino City
#261 - Lewis and Clark
#307 - Chinese Hanging
#346 - Pierce Courthouse




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ID-6
Sign # and Name


#504 - Worlds Largest Mill
#505 - Company Town

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ID-5
Sign # and Name


#286 - John Mullan

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ID-4
Sign # and Name


#424 - Frisco Mill  
#426 - Burke

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ID-3
Sign # and Name


#42 - Indian Mission
#285 - The Mullan Road

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US-2
Sign # and Name


#177 – Seneacquoteen

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I-90

Sign # and Name


#144 - Old Mission
#164 - Mullan Tree
#252 - 1910 Fire
#268 - Lake Steamers
#290 - Kellogg's Jackass
#322 - Sunshine Mine Disaster
#348 - Treaty Rock
#367 - Wallace
#373 - Willow Creek Slide
#421 - Lead-Silver Mines 
#430 - Murray Gold Fields


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I-86
Sign # and Name


#274 - American Falls
#338 - Oregon Trail
#339 - Emigrant Trails

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I-84
Sign # and Name


#193 - Initial Point
#198 - Oregon Trail
#199 - Glenn's Ferry   
#263 - Snake River
#291 - College of Idaho
#317 - Lake Bonneville
#336 - Salmon Festival
#375 - Oregon Trail
#379 - Basque Country
#415 - NNU
#455 - Emigrant Crossing


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I-15
Sign # and Name


#17 - Idaho's First Railroad
#222 - Beaver Canyon
#223 - Taylor's Bridge
#224 - Eagle Rock Ferry
#287 - Lava Formations
#289 - Idaho State University
#323 - Market Lake
#427 - Nez Perce War
#503-Chief Pocatello




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