41.860473° -114.056404° [allegedly]

I was looking for the most northeastern historical site and came across Annaville. According to the post office application:

The name of the site is Annaville
It's in Elko County
It is 30 miles southeast of Idaho's Raft River
It is 8 miles south of Goose Creek
It is 40 miles north of Buell [City]
It is 60 miles north east of Toano
It is 35 miles from Tecoma Station on the Central Pacific Rail Road.
It had a post office for about two years. James Hefferman was postmaster.

One assumes that the mileage figures are "road" miles, so one would have to determine exactly which roads were being used at the time to ascertain its location. The camp's lifespan was fairly brief, and it doesn't appear in too many newspaper articles. Clearly, there were mines in the area that gave cause for its existence, which seemed to happen some time in 1872. They were important enough at the time to draw attention from a Utah newspaper over 150 miles away.

According to Shawn Hall, Annaville-- also known as the Goose Creek Settlement-- was a trading post and lodging house developed at Goose Creek when it was on the Humboldt-Goose Creek-North Salt Lake branch of the California Trail, also used by the Chorpenning and Woodward mail stage. Abandoned from 1855 to 1858 because of trouble with the local aborigines, it continued to be used by emigrants, although the stages began using a route further south. Meanwhile, folks began to settle in the area and some rances developed. Since Hefferman agreed to be postmaster, the residents did not object when he named the post office after his wife . The office closed on October 21, 1874.
- Old heart of Nevada, Shawn Hall.

Goose Creek.—Reports from the Goose Creek mining district indicate that the mines there are being worked extensively. The new town, called Annaville, is growing very rapidly, and we are pleased to learn that our former fellow townsman General J. J. Heffernan has lately been appointed Justice of the Peace of that flourishing camp.
-The Corinne Daily Reporter, October 18, 1872

Apparently it was big enough to hold an election for a Justice of the Peace, although there were already dubts about the value of the mines in the area.

Goose Creek District.—We understand that this camp is in a flourishing condition, notwithstanding some doubts have been cast upon the value of the mines. Annaville, the name of the camp, feels large enough to have a Justice of the Peace, and Gen. Heffernan has been elected to that important post. Violators of the law will find Annaville a hard road to travel.
-The Utah Mining Journal, October 19, 1872

A weekly mail route was described in a newspaper.

45137—From Tecoma to Annaville, 25 miles and back, once a week. Leave Tecoma Monday at 8 a m; arrive at Annaville by 4 p m. Leave Annaville Tuesday at 8 a m; arrive at Tecoma by 4 p m.
-The Pioche Record, December 23, 1873

The State Mineralologist wasn't impressed with the district.

ELKO COUNTY (GOOSE CREEK DISTRICT) STATE MINERALOGIST REPORT, 1873-1874, p. 33 FOR 1875-1876, p. 24 This district is 25 miles north of Tecoma and 10 miles from the Utah line. First locations made in summer of 1872; formation is limestone and porphyry; veins vary 2-3' wide and crop out for 300'. The mines were discovered by an Indian who showed them to Mr. Thomas and Brown. 90 locations made; principal ones are the Colton Thomas, Anna Carroll and the Providence. The veins are all silver-bearing, ores being a chloride. Assays from $160-$350 per ton. Two companies are working the Colton Thomas and Anna Carroll. The Laurel was located in July 1873 by Mr. McKitrick and some good ore is found near the surface.

[hand written] COULD THIS BE DELANO?

For 1875-1876: Goose Creek District is in the Goose Creek range which separates Goose Creek from Thousand Spring Valley. The mines were discovered by an Indian. A great many locations have been made here, but as yet no very important results have been obtained.
-STATE MINERALOGIST REPORT 1873-74

One of the last periodical mentions we could find was regarding a shipment of mining equipment.

CITY MATTERS.
MACHINERY FOR NEVADA.—The Chicago Gold and Silver Mining Company, on Wednesday, shipped to its mines in Annaville, Nevada, about sixty tons of machinery, a ten stump mill boiler, engines, furnace, retorts, and all complete—all of Chicago manufacture.
-The Workingman's Advocate (Chicago [Ill.]), June 20, 1874

We know that in 1876 folks are still lliving here, given this partial list of Elko county delegates.

The Democratic County Central Committee met yesterday, pursuant to the call of the Chairman; present H. A. Harvill, Chairman; J. M. Dorsey, John R. Bradley, Allen Fisher and F. F. Marx, (J. P. Edoff,) proxy. The Chairman stated the object of the meeting, and called as the first order of business, for suggestions as to the most feasible plan for the selection of delegates to the State Convention, which meets on the 28th of August for the purpose of nominating Presidential electors, a Congressman and a Justice of the Supreme Court, also the appointing of a State Central Committee. After thoroughly discussing the subject it was concluded that, in view of the fact that it was about harvest time, and that we have already had one convention for the election of delegates to a former State Convention this year, and will have to hold another, it would be to the interest of the party for the Committee to district the County and appoint the ten delegates we are allowed. The following are the voting precincts in each district and the delegate elected from each:
Tuscarora and Independence Valley—Mart. Smith.
Mountain City and Island Mountain—John H. Bacon.
Cornucopia, White Rock and Blythe City—S. M. Henley.
Toano, Buel, Tecoma and Annaville—F. F. Marx.

Work is being carried out in the district, but it's unknown if Annaville still exists, six years after its post office was shuttered.

Goose Creek District lies in the mountains bearing the same appellation, about thirty miles north of Tecoma, a station on the Central Pacific Railroad. The mines were first discovered by an Indian, who pointed them out to Messrs. Thomas and Brown. The organization took place in the summer of 1872, and about ninety locations were made. The geological formation is limestone and porphyry, the veins varying in width, and crop out in many p laces on the surface. Wood and water are very scarce in the immediate vicinity, though ther e is a good supply within a radius of four or five miles. Assays give from $160 to $350 per ton. Some work is being performed in the district at the present time.
-DISTRICT SUMMARY; ASSAYS; HISTORY OF NEVADA, 1881

What we can't figure out is why this town even existed in the first place. It doesn't appear to be near any main roads. There don't seem to be any mines nearby.

There is documentation referring to a mine named the Anna Carroll in the Goose Creek district but there doesn't seem to be any information as to its location, or if it had anything to do with the name Annaville. Helen Carlson says

ANNA. This feminine given name designates a mountain in Nye County, about fifteen miles south of Fairview Peak (USGB 5904; OPN, p. 52), with a variant Annie (1881 Map; GHM, NY 2); and in combined form ANNAVILLE, an early post office in Elko County, in operation from October 10, 1872, until October 21, 1874 (FTM, p. 1). The diminutive suffix appears in ANNIE CREEK, a tributary of the Bruneau River, southwest of Charleston in northern Elko County (SG Map 11); "named for Annie Bieroth who lived in the area" (EP, p. 10).
- Nevada Place Names: A Geographical Dictionary

I can't find any records of Hefferman being married so for now we'll go with Shawn and say Annaville was named after his wife.

Well, we see the postal application and mentions in news article so we know it existed-- some place. The USGS Domestic Names data base lists two Annaville's both of them in Texas, oddly enough. But we can not find it on any map. Topoquest claims to know its location but there doesn't seem to be anything there. Waiting to hear back from Elko County to see if they have a townsite plat for it, which may give a clue as to its exact location. Maybe somebody can run up there and see if there are any cans laying around.

On a lighter note, I thought there might have been a Wheeler survey map available for this area, so I asked ChatGPT to find it for me. It was totally confused, suggesting the wrong maps and then apoligizing, only to suggest another wrong map. When I finally told it, "Using that Wheeler index, there IS no map for the coordinates I want," it finally admitted, "That is the key point, and you are correct. there is no Wheeler topographic atlas sheet whose printed footprint contains 41.860818° N, 114.055957° W. That means my earlier attempts to force your location onto 49, 41A, 32C, etc. were fundamentally wrong."

I guess that's an apology.