Beginning in 1915, intrastate bus service was regulated by the Colorado Public Utilities Commission. Information from annual reports is available through 1930.
Skipped certificate numbers were strictly freight carriers. Apparently, new certificate numbers were originally assigned to routes added by established carriers, but then the original certificate numbers were assigned to cover the added routes. As the information in the annual reports was less thorough in later years, only the earliest added routes are mentioned.
Additional companies were granted certificates which were cancelled soon after, and are not listed. Information was presented differently in each annual report, resulting in inconsistencies and incompleteness in the data presented here.
Many certificates were actually issued to taxicab or livery companies, offering sightseeing service to the Rocky Mountains.
Certificate Date Name Route No. Issued Or Headquarters 3 Jun. 21, 1920 M. F. Thomas Transfer Line Morrison, Evergreen, Starbuck Sold or abandoned by 1928 4 Apr. 21, 1921 Hair & Balle Transportation Co. Walden-Wyocolo WY Out of business 5 Apr. 23, 1921 Colorado Motor Way Denver-Longmont-Fort Collins 5 Sep. 15, 1923 Colorado Motor Way Denver-Greeley-Fort Collins 5 Jul. 11, 1924 Colorado Motor Way Fort Collins-Wellington Route abandoned 5 Dec. 19, 1925 Colorado Motor Way Longmont-Greeley 6 May 6, 1921 M. Fromm Fruita-Mack To J. W. Hayden by 1928 7 Oct. 3, 1921 Montrose Auto Stage & Taxi Line Montrose-Telluride 9 May 2, 1922 Western Slope Motor Way Grand Junction-Montrose 9 Jun. 15, 1923 Western Slope Motor Way Grand Junction-Hotchkiss-Paonia 9 Aug. 7, 1926 Western Slope Motor Way Montrose-Silverton-Durango Sold or abandoned by 1930 10 May 9, 1922 Ridgway Garage Ridgway-Ouray 11 Dec. 18, 1922 Denver & Steamboat Springs Stage Co. Denver-Steamboat Springs 11 Sep. 24, 1924 Denver & Steamboat Springs Stage Co. Steamboat Springs-Craig 12 Apr. 23, 1923 L. W. Parcell Silverton-Ouray Sold or abandoned by 1928 13 (see 9) 14 Jul. 2, 1923 Lewis J. Funk Grand Junction-Palisade Sold or abandoned by 1928 15 (see 5) 16 Jan. 17, 1924 James Pearson Silverton-Eureka Transfer granted Jul. 25, 1928 to L. W. Parcell 19 (see 5) 20 Aug. 26, 1924 Charles Maxday Sr. Trinidad-Walsenburg 21 Aug. 26, 1924 Robert A. Arnett Steamboat Springs-Craig Transfer granted Jun. 1, 1927 to M. B. Edmonston Transfer granted Aug. 18, 1927 to Stanley L. Larson Stanley L. Larson was Certificate No. 225 22 (see 11) 27 Dec. 11, 1924 Dick Wilson Dolores-Mancos Sold or abandoned by 1928 29 Dec. 22, 1924 Fouret Brothers Trinidad-NM State Line 29 Dec. 22, 1924 Fouret Brothers Trinidad-Starkville 30 (see 29) 31 Jan. 20, 1925 Harry Satero Pueblo-Walsenburg 31 May 25, 1925 Harry Satero Pueblo-Canon City 31 Nov. 30, 1926 Harry Satero Pueblo-Vineland To J. W. Hoffman by 1928 Sold or abandoned by 1930 32 Feb. 5, 1925 C. H. Williams & Son Cripple Creek-Colorado Springs 33 Feb. 5, 1925 Black & Brooks Garage Sterling-Holyoke 34 Feb. 6, 1925 Frank Hart Woodland Park-Colorado Springs 34 Feb. 6, 1925 Frank Hart Green Mountain Falls-Colorado Springs Discontinuance granted Jun. 3, 1927 35 (see 34) 36 Apr. 29, 1925 Platte Valley Transportation Co. Greeley-Sterling 38 May 25, 1925 San Luis Central Railroad Co. Monte Vista-Center Transfer granted Mar. 31, 1927 to Rio Grande Motor Way Rio Grande Motor Way was Certificate No. 149 39 (see 31) 43 Aug. 4, 1925 Denver & Interurban Motor Co. Denver-Boulder 44 Aug. 5, 1925 San Luis Valley Bus Co. Center-Saguache-Salida Transfer granted Mar. 31, 1927 to Rio Grande Motor Way Rio Grande Motor Way was Certificate No. 149 45 Sep. 1, 1925 Denver-Limon Bus Lines Denver-Limon Transfer granted Jul. 30, 1927 to Paradox Land & Transportation Co. Sold or abandoned by 1930 46 Sep. 22, 1925 John Mountain Ouray-Silverton Certificate revoked Nov. 1, 1927 47 (see 5) 48 Apr. 21, 1926 Denver-Colorado Springs-Pueblo Motor Denver-Pueblo 49 May 6, 1926 Curnow Livery & Transfer Co. Denver-Silver Plume 50 May 7, 1926 Denver & So. Platte Transportation Co. Englewood-Littleton 52 May 13, 1926 Greeley-Briggsdale Motor Bus Line Greeley-Briggsdale Sold or abandoned by 1930 53 May 13, 1926 Jesse T. Tripp Pueblo-Holly Transfer granted Sep. 23, 1927 to Harry Satero Harry Satero was Certificate No. 31 54 Jun. 18, 1926 Olinger Corp. Denver-Morrison-Indian Hills To Indian Hills Transportation Co. by 1928 55 Jun. 18, 1926 Rocky Mountain Parks Transportation Denver-Estes Park 56 Jun. 18, 1926 Denver Cab Co. Denver-Bergen Park/Silver Plume 57 Jun. 18, 1926 Colorado Springs & Interurban Railway Colorado Springs-Manitou Discontinuance granted Nov. 15, 1927 58 (see 9) 59 Oct. 27, 1926 M. B. Stone Durango-Gallup NM 60 Nov. 16, 1926 Telluride Transfer Co. Telluride-Smuggler & Tomboy Mines 61 Nov. 16, 1926 A. E. Bivens Placerville-Paradox To Placerville-Paradox Stage Line by 1928 Placerville-Paradox Stage was Certificate No. 214 62 Nov. 16, 1926 J. D. MacKenzie Nederland-Boulder/other communities 63 Nov. 16, 1926 Sitton Brothers Dolores-Dove Creek 64 Nov. 22, 1926 Greeley-Estes Park Transportation Co. Greeley-Estes Park/La Salle Sold or abandoned by 1928 65 Nov. 23, 1926 Charles Bruce Capron Denver-Johnstown 66 Nov. 23, 1926 Glacier Route Boulder-Lyons/Allens Park 67 (see 66) 68 (see 31) 73 Feb. 16, 1927 Bus Transportation Co. Englewood-Fort Logan/Loretto Heights 75 Feb. 21, 1927 Greeley-Briggsdale Motor Way Greeley-Briggsdale Certificate originally awarded to Henry Schulz 76 Feb. 28, 1927 Champa 3 Auto Livery Denver-Rocky Mountain destinations 77 Mar. 7, 1927 Brown & White Cab Co. Denver-Rocky Mountain destinations 78 Mar. 7, 1927 Colorado Cab Co. Denver-Rocky Mountain destinations 79 Mar. 7, 1927 Champa 10 Taxi & Sightseeing Service Denver-Rocky Mountain destinations 80 Mar. 7, 1927 Oxford Auto Co. Denver-Rocky Mountain destinations 82 Mar. 7, 1927 Masterson Auto Service Co. Denver-Rocky Mountain destinations 83 Mar. 7, 1927 Burke Taxicab Line Eleven routes 84 Mar. 7, 1927 Whitney & Perry Sightseeing Co. Eleven routes 85 Mar. 7, 1927 Davis Sightseeing Service Seven routes 86 Mar. 7, 1927 Ranker & Semler Denver-Rocky Mountain destinations 87 Mar. 7, 1927 Arthur Taxi & Sightseeing Service Denver-Rocky Mountain destinations 88 Mar. 12, 1927 Fallico Auto Livery Denver-Rocky Mountain destinations 89 May 17, 1928 Otto Peterson Denver-Rocky Mountain destinations Acquire certificate from Large & Peterson granted Mar. 12, 1927 92 Mar. 12, 1927 Broadway Sightseeing Co. Eleven routes Sold or abandoned by 1930 95 Mar. 12, 1927 Square Deal Auto Service Co. Denver-Rocky Mountain destinations 97 Mar. 12, 1927 Western Scenic Auto Co. Denver-various scenic points 99 Mar. 12, 1927 Schram Scenic Auto Tours Denver-various scenic points 100 Mar. 12, 1927 Arthur H. Bunnell Denver-various scenic points 101 Mar. 29, 1927 Jim Carey Auto Livery Colorado Springs-various scenic points 102 Mar. 29, 1927 Conway Brothers Colorado Springs-various scenic points 103 Mar. 29, 1927 Almeron Davis Colorado Springs-various scenic points 105 Mar. 29, 1927 Bryant Auto Livery Colorado Springs-various scenic points 106 Mar. 29, 1927 C. F. Garriott Sightseeing Co. Colorado Springs-various scenic points 107 Mar. 29, 1927 G & W Garage & Tours Co. Colorado Springs-various scenic points 109 Mar. 29, 1927 Yellow Cab Co. Colorado Springs-various scenic points 110 Mar. 29, 1927 T. E. Anderson Manitou-various scenic points 111 Mar. 29, 1927 E. E. Nichols Hotel & Realty Co. Manitou-Colorado Springs 112 Mar. 29, 1927 Anderson & Harry Seeing Colorado Co. Colorado Springs-various scenic points To Hiawatha Tours Co. by 1930 114 Mar. 29, 1927 L. E. Dicks Colorado Springs-various scenic points 115 Gray Line Motor Tours Colorado Springs 116 Mar. 29, 1927 Pikes Peak Automobile Co. Manitou-various scenic points 117 Mar. 29, 1927 Buster & Williams Touring Co. Colorado Springs-various scenic points 118 McCaffery Brothers Colorado Springs 119 Mar. 29, 1927 William Irvine Colorado Springs-various scenic points 120 N. S. Nolan Manitou 121 Mar. 29, 1927 George H. Miller Colorado Springs-various scenic points 122 Mar. 29, 1927 Luther Johnson Sightseeing Livery Colorado Springs-various scenic points 123 Mar. 29, 1927 Colorado Springs Sightseeing Co. Colorado Springs-various scenic points 124 Mar. 29, 1927 Lewis L. Schwartz Sightseeing Livery Colorado Springs-various scenic points 125 Mar. 29, 1927 Otto's Scenic Co. Colorado Springs-various scenic points 127 Mar. 29, 1927 James T. Freeman Colorado Springs-various scenic points 128 Mar. 29, 1927 Mrs. D. F. Gaines Colorado Springs-various scenic points 130 Mar. 29, 1927 C. W. Kight & E. J. Tarman Colorado Springs-various scenic points 131 Mar. 29, 1927 William Olson Manitou-various scenic points 132 Mar. 29, 1927 Florenz Ordelheide Colorado Springs-various scenic points 133 Mar. 29, 1927 T. H. Smith Colorado Springs-various scenic points 134 Mar. 29, 1927 F. J. Burghart Colorado Springs-various scenic points 135 Mar. 29, 1927 P. P. Turner Colorado Springs-various scenic points 138 Mar. 29, 1927 Cadillac Sightseeing Co. Colorado Springs-various scenic points 139 Mar. 29, 1927 Antlers Livery & Taxicab Co. Colorado Springs-various scenic points 140 J. G. Shabouh Manitou 142 Mar. 29, 1927 George E. Bateman Manitou-various scenic points 143 Mar. 29, 1927 Colorado Springs Scenic Co. Colorado Springs-various scenic points 146 Mar. 29, 1927 E. E. Nichols Hotel & Realty Co. Manitou-various scenic points 147 Mar. 29, 1927 Cragmor Sanatorium Co. Cragmor Sanatorium-various points Sold or abandoned by 1930 148 Mar. 29, 1927 Robert Bensberg Colorado Springs-Cragmor Sanatorium To Colorado Bus Lines by 1930 149 Mar. 31, 1927 Rio Grande Motor Way Salida-Alamosa Also acquired Certificate Nos. 38/44 150 Apr. 4, 1927 Molloy Tours Boulder-various points 151 Apr. 6, 1927 Berwind Auto Line Trinidad-Vallorso 152 Apr. 14, 1927 H. S. & Thad Harp Meeker-Rifle 155 May 24, 1927 Burns Will Allens Park-Denver 156 May 25, 1927 Williams Livery Co. Central City-Idaho Springs 157 May 26, 1927 Antonio Sandoval Delagua-Trinidad Transfer granted Nov. 25, 1927 to Joe Festi Joe Festi was Certificate No. 158 158 May 26, 1927 Joe Festi Delagua-Trinidad 159 May 26, 1927 Frank Barbero Primero-Valdez-Trinidad Acquire certificate from Levo Pedri granted Jul. 13, 1927 161 May 25, 1927 Henry Muscati Manitou-various points 162 Frank W. Hoepner Manitou 164 May 25, 1927 B. E. Beals Colorado Springs-various points 165 May 25, 1927 Mountain Circle Auto Co. Colorado Springs-various points 166 May 25, 1927 Seven Falls Co. Colorado Springs-various points 167 May 25, 1927 O. J. Lepel Colorado Springs-Pikes Peak region 168 May 25, 1927 Charles Heter Colorado Springs-various points 170 May 25, 1927 Beryl Spradling Manitou-Pikes Peak region Sold or abandoned by 1930 171 May 25, 1927 W. H. Walker Colorado Springs-Pikes Peak region 174 Yellow Cab Co. Colorado Springs To Wilson-Walker Mountain Tours by 1930 175 Jun. 1, 1927 W. N. Clark Boulder-various points 176 Jun. 1, 1927 J. F. Gordon Boulder-various points To C. L. Elliott by 1930 177 Jun. 1, 1927 H. F. Brandhorst Boulder-various points 179 Jun. 1, 1927 Armstead Scenic Tours Boulder-various points 180 Jun. 1, 1927 Armstead Scenic Co. Boulder-various points 181 Jun. 1, 1927 Out West Sight Seeing Co. Boulder-various points 183 C. R. Davis Boulder 184 Jun. 1, 1927 C. W. Townsend Boulder-various points 186 Clarence G. Guy Lamar 191 Jun. 6, 1927 Premier Sightseeing Co. Denver-various scenic points 192 Jun. 7, 1927 Ed Burrows Denver-various scenic points 193 Jun. 7, 1927 Beard Taxi Service Denver-various scenic points 194 David Mannison Denver 196 Jun. 14, 1927 Rocky Mountain Sightseeing Co. Manitou-various points 200 Jun. 14, 1927 Jesse Taylor Colorado Springs-Pikes Peak region 207 Art W. Quinlan Boulder 210 Jun. 24, 1927 Fitzsimmons Bus & Taxi Co. Denver-Aurora-Fitzsimmons Hospital 213 Jul. 11, 1927 Harry Fraser Manitou-Pikes Peak region 214 Placerville-Paradox Stage Also acquired Certificate No. 61 216 Jul. 12, 1927 Clarence McDonald Pitkin-Parlin 219 Jul. 26, 1927 William R. Housley Craig-Great Divide 221 Jul. 27, 1927 Paul Schwank Denver-various scenic points 225 Stanley L. Larson Steamboat Springs Also acquired Certificate No. 21 228 Aug. 23, 1927 Fred Searway Buffalo Creek-various points 229 Aug. 25, 1927 T. F. Williams Kiowa-Elizabeth 231 Oct. 13, 1927 Interstate Bus Lines Greeley-Cheyenne WY Sold or abandoned by 1930 234 Nov. 19, 1927 Henry C. Bukey Denver-Jewish Consumptives Relief 239 Albert J. Walker Gold Hill 240 Jan. 4, 1928 J. C. DeVoss (Gold Hill Stage) Boulder-Gold Hill Sold or abandoned by 1930 251 Continental Sightseeing Co. Denver 253 Charles Robbins Estes Park 255 C. A. Potts & Son Villa Grove 256 Apr. 17, 1928 Denver & Crown Hill Railway Co. Denver-Crown Hill Cemetery 258 May 10, 1928 V. A. Phillips Cedaredge-Beckman Hotel 259 May 10, 1928 T. J. Wallendorf Cedaredge-Delta 261 Robert J. Coleman Grand Junction To Ernest E. Martin by 1930 262 May 10, 1928 Lewis-Enright Scenic Tours Boulder-various scenic points 263 May 11, 1928 Robert Portell Palisade-Grand Junction Sold or abandoned by 1930 264 May 12, 1928 Ada Alice Oleson Glenwood Springs-Gypsum-Wolcott Sold or abandoned by 1930 266 Jake Weller & Fred Hauf Lafayette 270 Mar. 29, 1927 Hammond Scenic Auto Co. Colorado Springs-various points 271 May 31, 1928 Cheyenne Mountain Co. Colorado Springs-Pikes Peak region 274 R. A. Spurlock Fairplay 275 Jun. 22, 1928 Broadmoor Hotel Garage Colorado Springs-Pikes Peak region 276 Jun. 22, 1928 Pioneer Southwestern Stages Denver-Los Angeles CA 277 Jun. 22, 1928 Pioneer Stages Denver-Kansas City-points east Sold or abandoned by 1930 279 Jul. 25, 1928 George W. Scott Jr. Cortez-Gallup NM 288 Aug. 2, 1928 Marcus Hight & James Phillips Gypsum-Burns 293 Sep. 11, 1928 Taylor Taxi & Transfer Trinidad city 294 Albert Powell Las Animas 296 Colorado-Utah Motor Way Grand Junction 297 Oct. 2, 1928 Glenn D. Baird Estes Park-various points 298 Oct. 2, 1928 Pickwick-Greyhound Lines Cheyenne WY-Denver-Kanorado KS via US40 301 Oct. 20, 1928 E. E. Eckels Greeley-Longmont 306 Wildon Beach Eads 310 Nov. 8, 1928 James R. Hobbs Evergreen-various points 311 Nov. 8, 1928 C. E. Goodrich Evergreen-various points 312 Nov. 24, 1928 Greeley Transportation Co. Greeley-Denver 313 Sterling-Scottsbluff Motor Line Scottsbluff 315 Col-Mex Transportation Co. Walsenburg 317 San Isabel Transportation Co. Pueblo 318 San Isabel Forest Tours Co. Pueblo 323 Camp Tours Colorado Springs 326 H. C. Beach Fort Collins 359 Renard Auto Service Co. Denver 363 John R. Trimble Dolores 367 Norman S. Payson Bayfield 371 John C. & Elizabeth Doherty Boulder 373 Twist Transfer Line Greeley 376 Chris Cristensen Fort Collins 377 Southern Kansas Stage Lines Wichita KS 379 Atlantic-Pacific Stages St. Louis MO 388 James A. Baird Kline 394 Interstate Transit Lines Omaha NE 395 Scott Brothers Fort Collins 398 Collamer Brothers Fort Collins 404 Agencies Transportation Co. Denver 405 J. V. Rhoades Denver 428 Harry L. Wood Manitou 430 Hal A. Brown Green Mountain Falls 431 Edgar A. Armentrout Green Mountain Falls 474 Clyde Lenocker La Junta 478 L. L. McMichael Holly 495 San Luis Valley Southern Railroad Co. Blanca 503 T. R. Sears Laramie WYThe final listings for Certificates of Convenience and Necessity were in 1930. With the Certificate Number, name and headquarters the only information available.