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18_43 SL-O Hillsdale

GPS: 41.181378, -104.503735

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Location / Airway

Location / Name

WYOMING:  Laramie County

43 SL-O Hillsdale, site No. 43 Salt Lake City-Omaha Airway

GPS: 41.181378, -104.503735

Transcontinental Airway

Route established September 8, 1920

Pilots Log February 21, 1921 Between Pine Bluff and Archer

OMA + 420. Pine Bluff, Wyo. — On the Union Pacific Railroad 2 miles north of the course. The railroad and creek again cross the course, the railroad, turning westward to Cheyenne and the creek, continuing south for 4 miles and then eastward. The country between Sidney and Pine Bluff is the roughest on the whole course from Omaha to Cheyenne, but plenty of emergency fields are found. A ridge extends southward from Pine Bluff, on which numerous dark green trees may be seen. Two miles southwest of Pine Bluff the Union Pacific tracks are crossed and for 5 miles lie south of the course. Then another intersection of the course and the railroad looping to the northward and again crossing the course at the small town of Archer.

OMA + 499. Archer Wyo. — A small town on the Union Pacific Railroad and 8 miles from Cheyenne.

Night Airmail

Flights started on July 1, 1924

Contract Air Mail

CAM #18 San Francisco CA-Chicago IL
Salt Lake City-Omaha airway
Medicine Bow-Sidney Section
18_43 SL-O Hillsdale


Boeing Air Transport awarded CAM #18 on January 28, 1927
Route established July 1, 1927


Drone Photos


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Observations and Notes


The Hillsdale Site is located east of Cheyenne, Wyoming in a large agricultural field north of Highway 30, approximately 200 feet from a dirt county road. 

The field had just been planted, and we did not want to cross it without permission from the land owner.  We drove to the nearest farm house (approximately 1 mile away) and contacted the owner.  He told us that the owner of that portion of the field lived several miles away, and gave us directions how to get there.  We were able to locate the farm house, but unfortunately nobody was at home.


The field was really wet so we only flew the drone. From the drone photos we took it is easy to see that the tip of the arrow has been broken off. Probably the result of farming in the area. This arrow is in very poor condition.

Contributors Photos

Courtesy of Greg Cobia and Kaarin Engelmann August 11, 2018


Domestic Air News, Serial No. 48 page 23, Stanford University Green Library, basement stack W-158; C23.9:6-32, March 15, 1929

Hillsdale, WY:  Site 43, 24” 2,000,00 c.p. electric beacon, rotating 6 r.p.m., Long. 104° 33’ 55”, Lat. 41° 11’ 08”, Alt. 5700’.  (Intermediate fields and beacons have been placed in operation on the following sites of the Salt Lake-Omaha airway.)


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