The original Grand County contained North Park as well as Middle Park, and during the mining boom of the early 1880's there were several mining camps east of the modern town of Rand. It was several years after the mining boom northern area of Jackson County was created.

Teller City was founded in 1879 and named for Colorado's famous Senator Henry M. Teller, who later became U.S. Secretary of the Interior.  By 1882, the population of Teller City was about 1200.  It had a fine hotel with 40 rooms, a newspaper and two steam saw mills.  It was a lively Old West town with twenty seven saloons and a number of "houses of ill repute".

Some high quality ore assayed at Teller City was as much as $3000 a ton, but most of that soon ran out and by 1884, the high shipping costs to far away smelters dropped the price per ton dropped to $20. The best mine, Endomile, was three miles from town.

Crescent City, southwest of Teller City had an even more brief existence, but there was population enough for a U.S. Post Office in 1880. 

Rumors of valuable silver three miles sough of Teller City drew a number of prospectors to found the camp known as Tyner.  John Noble Tyner was the First Assistant Postmaster General of the United States and visited the mining camp so named in 1879.  He promised the miners a weekly mail delivery if at least 2 miners mined through the winter.  Tyner had been a special agent for the Post Office from 1861 thru 1868, at which time he was appointed to serve in an open seat in the U.S. House of Representatives for Indiana.  He ran for election win the appointed term ended and was elected and continued to be reelected and serve as a Representative until 1875 when President Grant appointed him Second Assistant Postmaster General.  Grant would later appoint him to the "big job" of Postmaster General in 1876. 

Tyner worked to elect Rutherford B. Hayes in 1876 and after Hayes was elected and took office in March of 1877, Hayes appointed a new Postmaster General, but gave the second spot, First Assistant to the Postmaster General to Tyner.  Historians suggest that Tyner's demotion angered him to the point that he allowed wide spread corruption in the day to day operation of the Postal Service which was his responsibility to over see. He resigned in 1881 under great public pressure from what became known as the "Star Route Fraud scandal".  He would remain a political figure  being appointed  various positions  with the U. S. Postal Service until shortly before his death in 1904.  Although indited three times for corruption in his Post Office management, he was never convicted.  The "Star Route Fraud scandal", may have local implications.  It had to do with over charging and providing needless postal routes, roads and post offices and kick backs to politicians from contractors .

The first settlers in Granby realized the sunny days and cool nights were perfect for growing one crop in particular, lettuce. Lettuce farming boomed in the 1920's and a new industry was born. Granby had become an important railway center as tracks were laid over the Divide at Rollins Pass,giving the Moffat Railroad access to Salt Lake City.

Granby produced some of the best-known lettuce in America. There are even tales that New York's Waldorf-Astoria Hotel bragged of their “Granby Lettuce” on the menu. Then a blight settled into the soil, probably brought in by the wooden crates used for shipping, and the lettuce business was ruined. Since then, ranching has replaced agriculture as Granby's major industry.

 Though few, high altitude water ditches have had a major impact on Grand County's history and economy, there were many early valley ditches transporting this precious commodity from water-right sources to the owner's ranch. However, the threat of transporting great volumes of water from our county to Boulder County via high altitude ditches appeared back in 1889.  Certain interests east of the Divide talked the Legislature into appropriating $25,000, for surveying and developing a 20-mile-long canal over South Boulder Pass to South Boulder Creek.  Amazingly, neither Grand County residents nor very many others opposed this notion.  Luckily the state engineer found the terrain so difficult that not even $2000 was ever spent on the project.


The next effort occurred also in 1889.  This privately financed plan was to develop a two-branched canal system that would move 700 second feet of water to a half-mile tunnel just beneath Berthoud Pass at over 11,000 feet, thence down to Clear Creek and on to the Golden area.  Initial surveys were begun that fall and roads laid out the following year.  The effort bogged down but was resurrected in 1900 under the Agricultural Ditch Co., supplemented in 1902 with the Berthoud Canal Co.  The canal was partially completed by the Frank Church family ranching interests of Jefferson County by 1906.  The ditch, which can be walked today, runs from Second Creek to Berthoud Pass, though it no longer carries much water.  However, the Church Ditch water rights coming from Clear Creek still exist and today are owned by Northglenn.

Proposed in 1890 by the Water Supply and Storage Company of Fort Collins, a greater canal was to be built 1000 feet above the Kawuneeche Valley, that would tap the high tributaries of the North Fork of the Grand River, sending the water over Poudre Pass to a reservoir and then into the Cache La Poudre River and on to agricultural areas east of the Front Range.  The water company, later known as the Grand River Ditch Company, appropriated 525 second feet at the time of the initial diversion in 1892.  (When the Grand River was renamed the Colorado River in 1921, the company was changed to the Grand Valley Irrigation Company.)  The ditch was dug by hand, primarily by Japanese and Mexican laborers.  By 1900, water was flowing eastward.  

By 1906, this major canal, known as the Grand Ditch, and draining water from the Never Summer Range, had a capacity of nearly 358 second feet with 12 headgates within 8 miles, running from Baker Creek to the pass at 10,179 feet, plus a smaller canal carrying 183 second feet within 11 miles, coming from Specimen Mountain.  In 1936, using machinery, the ditch was lengthened to 14 miles.  The Grand Ditch is about 20 feet wide and 6 feet deep, though the water is rarely more than 3 feet deep, and this water irrigates some 40,000 acres in Weld and Larimer counties.

The National Park Service has argued against the allocation of all this water to the canal as it is needed to support plant life and animal habitat.  Becuase river water flow was cut in half, the immediate effect was a reduction in the fish population in the Colorado River.  More recently, a major washout in the ditch caused devastating damage to the slopes below the ditch and to the Colorado River itself.  Hikers climbing up from the valley use the Grand Ditch as a route to the high peaks and lake.  But as viewed from below, the Grand Ditch is often considered an ugly scar on the landscape.

Of all the leisure time activities available to the pioneers, dancing was the favorite. Dances were held in grand hotels that remained from the mining boom, such as the Fairview House and The Garrison House in Grand Lake. Quadrilles, a type of square dance, were popular at the time. A fiddler would provide the music and serve as the caller. These parties would start in the evening and last all night.

The formidable temperatures and great traveling distances were incentive for getting the most out of every gathering. Winter Sports have also always been a popular pastime. Skiing was introduced to the region during the winter of 1883. Snowshoeing and sleigh rides were also enjoyed. 1882 officially brought the arts to the Grand Lake area when the Dramatic Society was organized. A production of the well-known comedy "Our Boys" was the premiere performance.