John Kenneth Aldrich was a geologist, lecturer, and author whose "Ghosts of . . ." books and accompanying topo maps are a boon to hobbyists, explorers, and those interested in Colorado mining history. These books, each with beautiful color photographs, ghost town history, and geological information (but no "ghost" stories) cover 427 locations as listed below. Each book is 34 to 64 pages.

1. Ghosts of Clear Creek County with map
2. Ghosts of Gilpin County with map
3. Ghosts of Park County with map
4. Ghosts of Boulder County with map
5. Ghosts of Summit County with map
6. Ghosts of Lake County (and eastern Pitkin County) with map
7. Ghosts of Teller County with map
8. Ghosts of Chaffee County (and eastern Gunninson County) with map
9. Ghosts of the Sangre de Cristo Area (and Saguache, Custer, Alamosa, Fremont, and Costilla Counties) with map.
10. Ghosts of the Eastern San Juans (and Mineral, Saguache, Gunnison, Rio Grande, and Conejos Counties) with map
11. Ghosts of Pitkin County (and northern Gunnison County) with map
12. Ghosts of Northern Colorado (Eagle, Grand, Jackson, Routt, and Larimer Counties) with map
13. Ghosts of the Western San Juans Vol. 1 (Ouray, San Juan, and Hinsdale Counties) with map
14. Ghosts of the Western San Juans Vol. 2 (San Miguel, La Plata, and Dolores Counties) with map

Name	County	Number
Adelaide	Lake	06
Adrian	Summit	05
Alicante	Lake	06
Alice	Clear Creek	01
Alma	Park	03
Almont	Gunnison	11
Alpine	Chaffee	08
Alpine Station	Gunnison	08/15
Alpine Tunnel	Gunnison	08/15
Alta	San Miguel	14/15
Altman	Teller	07/15
Altona	Boulder	04
American City	Gilpin	02
Ames	San Miguel	14
Anaconda	Teller	07
Animas City	La Plata	14
Animas Forks	San Juan	13/15
Antelope	Gilpin	02
Antelope Springs	Mineral	10
Apex	Gilpin	02
Arbourville	Chaffee	08
Arequa	Teller	07
Argentine	Summit	05/15
Arrastra	San Juan	13
Arrow (Arrowhead)	Grand	12
Ashcroft	Pitkin	11/15
Aspen	Pitkin	11
Astor City	Eagle	12
Babcock	Chaffee	08
Bachelor	Mineral	10
Baker City	San Juan	13
Baker Park	San Juan	13
Baker's Tank	Summit	05
Bakerville	Clear Creek	01
Balarat	Boulder	04
Baldwin	Gunnison	11/15
Balfour	Park	03
Baltimore	Gilpin	02
Bandora	San Juan	13
Barry	Teller	07
Basalt	Eagle/Pitkin	11
Beartown	San Juan	13
Belden	Eagle	12
Biedell	Saguache	10
Birdseye	Lake	06
Black Hawk	Gilpin	02
Bonanza	Saguache	09/15
Boreas	Park/Summit	03/05
Boston	Summit	05/15
Bowerman	Gunnison	08
Bowman	Gunnison	08
Braddocks	Summit	05
Breckenridge	Summit	05
Brownsville	Clear Creek	01
Brumley	Lake	06
Buckskin Joe	Park	03
Buena Vista	Chaffee	08
Busk	Lake	06
Cache Creek	Chaffee	08
Calumet	Chaffee	08
Cameron	Teller	07
Camp Albion	Boulder	04
Camp Bird	Ouray	13
Camp Frances	Boulder	04
Camp Hale	Eagle	12
Camp Harrigan	Lake	06
Camp Providence	Boulder	04
Camp Tolcott	Boulder	04
Capitol City	Hinsdale	13
Carbonate	Garfield	11
Carbonateville	Summit	05
Carbondale	Garfield	11
Cardinal	Boulder	04
Carey's Camp	Pitkin	11
Caribou	Boulder	04
Carnero	Saguache	10
Carson	Hinsdale	13/15
Central City	Gilpin	02
Champion Mill	Lake	06/15
Champion Mine	Lake	06/15
Chance	Gunnison	10
Chattanooga	San Juan	13
Chihuahua	Summit	05
Clark	Routt	12
Cleora	Chaffee	08
Cleveland	Eagle	12
Clinton	Lake	06
Climax	Lake	06
Clinton City	Summit	05
Cloud City	Gunnison	11
Cochitopa	Saguache	10
Colfax	Custer	09
Columbine	Routt	12
Commodore Camp	Alamosa	09
Como	Park	03
Conger	Summit	05
Cooper's Camp	Pitkin	11
Cooper Rock	Boulder	04
Creede	Mineral	10/15
Crested Butte	Gunnison	11
Crestone	Saguache	09
Cripple Creek	Teller	07
Crisman	Boulder	04
Crystal	Gunnison	11/15
Custer City	Custer	09
Dallas City	Ouray	13
Dawson City	Fremont	09
Del Norte	Rio Grande	10
Delaware Flats	Summit	05
Dickey	Summit	05
Dillon	Summit	05
Dora	Custer	09
Downieville	Clear Creek	01
Dubois	Gunnison	10
Dumont	Clear Creek	01
Dunton	Dolores	14
Durango	La Plata	14
Duchtown	Grand	12
Dyersville	Summit	05/15
East Portal	Gilpin	02
Eclipse	Teller	07
Eldora	Boulder	04
Elkton	Teller	07
Embargo	Saguache/Rio Grande	10
Empire	Clear Creek	01
Engineer City	Hinsdale	13
Eureaka	San Juan	13
Evansville	Lake	06
Everett	Lake	06
Evergreen Lakes	Lake	06
Exchequerville	Saguache	09
Fairplay	Park	03
Fall Creek	San Miguel	14
Fall River	Clear Creek	01
Farnham Spur	Summit	05
Filger City	Summit	05
Finntown	Lake	06
Fisherville	San Juan	13
Floresta	Gunnison	11
Folsome	San Miguel	14
Forks Creek	Clear Creek	01
Fourth of July Mine	Boulder	04
Franklin	Summit	05
Free Gold	Chaffee	08
Freeland	Clear Creek	01
Frisco	Summit	05
Fryingpan River Towns	Lake	06
Fulford	Eagle	12
Galena	Fremont	09
Gambell Gulch	Gilpin	02
Garfield	Chaffee	08
Garland City	Costilla	09
Gaskill	Grand	12
Geneva	Clear Creek	01/15
Georgetown	Clear Creek	01
Georgia Bar	Chaffee	08
Gillett	Teller	07
Gilman	Eagle	12/15
Gilpin	Gilpin	02
Gilson Gulch	Clear Creek	01
Gladstone	San Juan	13
Glenwood Springs	Garfield	11
Gold Dirt	Gilpin	02
Gold Hill	Boulder	04
Gold Hill Station	Boulder	04
Gold Lake	Boulder	04
Gold Park	Eagle	12
Goldfield	Teller	07
Gothic	Gunnison	11
Grand Island	Boulder	04
Grand Lake	Grand	12
Granite	Chaffee	08
Graymont	Clear Creek	01
Gresham	Boulder	04
Gunnison	Gunnison	11
Guston	Ouray	13/15
Guston	Ouray	13/15
Hahn's Peak	Routt	12
Hall Valley	Park	03
Hamilton	Park	03
Hancock	Chaffee	08
Handcart Gulch	Park	03
Harvard City	Chaffee	08
Haywood	Summit	05
Henson	Hinsdale	13
Hesperus	La Plata	14
Hessie	Boulder	04
Highland	Pitkin	11
Highland Mary	San Juan	13
Hitchen's Camp	Grand	12
Holland	Park	03
Holy Cross City	Eagle	12/15
Horseshoe	Park	03
Hortense	Chaffee	08
Howardsville	San Juan	13
Howland	Lake	06
Ibex	Lake	06
Idaho Springs	Clear Creek	01
Ilse	Custer	09
Independence	Pitkin	06
Independence	Teller	07
Iris	Saguache	10
Iron City	Chaffee	08
Ironton	Ouray	13/15
Irwin	Gunnison	11
Ivanhoe	Pitkin	06
Jack's Cabin	Gunnison	11
Jamestown	Boulder	04
Janeway	Pitkin	11
Jasper	Rio Grande	10
Jefferson	Park	03
Jimtown	Mineral	10
JunctionCity	Summit	05
Kerber City	Saguache	09
Keystone	Summit	05
Kingston	Gilpin	02
Kokomo	Summit	05
La Plata	La Plata	14
Lake City	Lake	06
Lake City	Hinsdale	13
Lake Gulch	Gilpin	02
Lakewood	Boulder	04
Lamartine	Clear Creek	01/15
Larium	Summit	05
Lawrence	Teller	07
Lawson	Clear Creek	01
Leadville	Lake	06
Leavick	Park	03
Lenado	Pitkin	11
Liberty	Saguache	09
Lincoln	Summit	05
Lizard Head	San Miguel	14
Loma	Rio Grande	10
London Junction	Park	03
London Mines, The	Park	03/15
Lost Canyon Placers	Chaffee	08
Lost Trail Camp	Hinsdale	13
Lulu City	Grand	12
Magnolia	Boulder	04
Malta	Lake	06
Manhattan	Larimer	12
Marble	Gunnison	11/15
Mary City	Boulder	04
Masontown	Summit	05
Massive City	Pitkin	06
Matterhorn	San Miguel	14
Mayday	La Plata	14
Maysville	Chaffee	08
Middleton	San Juan	13
Midway	Teller	07/15
Mill Pond	Eagle	12
Mineral Point	San Juan	13
Missouri Flats	Gilpin	02
Mitchell	Eagle	12
Mitchell Cabins	Summit	05
Monarch	Chaffee	08
Monarch	Grand	12
Montezuma	Summit	05
Montgomery	Park	03
Mosca Station	Alamosa	09
Mosquito	Park	03/15
Mound City	Teller	07
Mount Alto	Boulder	04
Mount Princeton	Chaffee	08
Mountain City	Gilpin	02
Mudsill	Park	03
Music City	Saguache	09
Naomi	Summit	05
Nathrop	Chaffee	08
Nederland	Boulder	04
Nevadaville	Gilpin	02/15
Niegoldtown	San Juan	13
Ninety Four	Clear Creek	01/15
North Creede	Mineral	10
North Empire	Clear Creek	01
North Star	Gunnison	08/15
Nugget	Gilpin	02
Ohio	Gunnison	08
Ophir	San Miguel	14
Ophir Loop	San Miguel	14
Orient	Saguache	09
Oro City	Lake	06
Orodelfan	Boulder	04
Ouray	Ouray	13
Pagosa Springs	Archuleta	14
Pandora	San Miguel	14
Park City	Park	03
Parkville	Summit	05
Paarlin	Gunnison	11
Parrot City	La Plata	14
Pearl	Jackson	12
Perigo	Gilpin	02
Perins	La Plata	14
Peru	Summit	05
Pitkin	Gunnison	08
Pittsburg	Gunnison	11
Placerville	San Miguel	14
Placita	Pitkin	11
Platoro	Conejos	10
Ploughkeepsie	San Juan	13
Poncha Springs	Chaffee	08
Powderhorn	Gunnison	10
Preston	Summit	05/15
Puma City	Park	03
Puzzler	Boulder	04
Quartz	Gunnison	08
Quartzville	Park	03
Querida	Custer	09
Quigleysville	boulder	04
Recen	Summit	05
Red Elephant	Clear Creek	01
Red Mountain	Ouray	13
Redcliff	Eagle	12
Redstone	Pitkin	11
Rexford	Summit	05
Rico	Dolores	14
Ridgway	Ouray	13
Robinson	Summit	05
Rockwood	La Plata	14
Rollinsville	Gilpin	02
Romley	Chaffee	08
Rose's Cabin	Hinsdale	13
Rosita	Custer	09
Royal Flush	Routt	12
Ruby	Ouray	13
Ruby	Pitkin	06
Russell	Costilla	09
Russell Gulch	Gilpin	02
Sacramento	Park	03/15
Saguache	Saguache	09
Saint Elmo	Chaffee	08/15
Saint Kevins	Lake	06
Saints John	Summit	05/15
Salida	Boulder	04
Salida	Chaffee	08
San Miguel	San Miguel	14
Santiago	Clear Creek	01/15
Sapinero	Gunnison	10
Satank	Garfield	11
Sawpit	San Miguel	14
Schofield	Gunnison	11
Sedgwick	Saguache	09
Shavano	Chaffee	08
Sherman	Hinsdale	13
Sherrod	Gunnison	08
Shipler's Cabin	Grand	12
Sidneyville	Clear Creek	01
Silver City	Clear Creek	01
Silver Cliff	Custer	09
Silver Creek	Clear Creek	01
Silver Dale	Clear Creek	01
Silver Lake	San Juan	13
Silver Plume	Clear Creek	01/15
Silverheels	Park	03
Sky City	Saguache	10
Slate Mountain	Eagle	12
Slavonia	Routt	12
Smith Hill	Gunnison	11
Sneffels	Ouray	13
Soda Springs	Lake	06
Spanish Bar	Clear Creek	01
Spar City	Mineral	10
Spencer	Gunnison	10
Spencerville	Summit	05
Spook City	Saguache	09
Springdale	Boulder	04
Stratton	Teller	07
Stringtown	Lake	06
Stumptown	Lake	06
Stunner	Conejos	10
Sugarloaf	Boulder	04
Sulphide Flats	Boulder	04
Summerville	Boulder	04
Summitville	Rio Grande	10/15
Sunnyside	Mineral	10
Sunset	Boulder	04
Sunshine	Boulder	04
Sunshine	Garfield	11
Swan City	Summit	05
Swandyke	Summit	05
Swanville	Summit	05
Switzerland Park	Boulder	04
Tabor	Lake	06
Tarryall	Park	03
Teller City	Jackson	12/15
Telluride	San Miguel	14
Tellurium	Hinsdale	13
Tiger	Summit	05
Timber Hill	Hinsdale	13
Tin Cup	Gunnison	08/15
Titusville	San Juan	13
Tolland	Gilpin	02
Tomboy	San Miguel	14/15
Tomichi	Gunnison	08
Tourtelotte	Pitkin	11
Tracy's Hideout	Eagle	12
Tungsten	Boulder	04
Turret	Chaffee	08
Twin Lakes	Lake	06
Ula	Custer	09
Valdoro	Summit	05
Vanadium	San Miguel	14
Vicksburg	Chaffee	08
Victor	Teller	07
Villa Grove	Saguache	09
Virginia Dale	Larimer	12
Vulcan	Gunnison/Saguache	10
Wagon Wheel Gap	Mineral	10
Waldorf	Clear Creek	01
Wall Street	Boulder	04
Wapiti	Summit	05
Ward	Boulder	04
Wasson	Mineral	10
Waunita Hot Springs	Gunnison	08
Weaver	Mineral	10
Webster	Park	03
Westcliffe	Custer	09
Weston	Park	03
Wheeler	Summit	05
Whiskey Park	Routt	12
White Pine	Gunnison	08
Whitecross	Hinsdale	13
Whitehorn	Gunnison	08
Williamsburg	Boulder	04
Winfield	Chaffee	08
Wolcott	Eagle	12